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演讲稿具有逻辑严密，态度明确，观点鲜明的特点。在不断进步的时代，演讲稿的使用频率越来越高，你写演讲稿时总是没有新意？下面是小编为大家收集的英语演讲稿，仅供参考，欢迎大家阅读。
英语演讲稿1
Hi everyone. My topic today is Maths in my Eyes.When I mention the word“maths” some adjectives will come to mind, boring, difficult and complicated.But I think maths is very interesting. It is used almost everywhere in our lifeand also related to art and music.We all know one geometrical concept, thegolden section. It's very important in painting, sculpture and architecture,such as the Parthenon in Athens and the Venus de Milo. In nature a littlepentagonal flower has its golden section. It looks beautiful.What about itsconnection with music? Lets take a look at a straight and tight string. Pluckit, and then halve its length, then pluck it again. The sound we hear is thesame note but a higher frequency. The Greek mathematician Pythagoras discoveredthis law and it developed into the musical scale we know today.Another exampleis from the famous composer, Bach. When we listen to his music in “Well-TemperedClavier”, we find the notes are always getting higher .But amazingly, in theend, it comes back to the initial height. Why is it? That's why Bach was great!It's a very interesting maths problem. We call it a paradox.These days we learnmaths at school. The only purpose is to get a high mark. But I personally thinkthat those with curious and creative minds will open the door to the world ofmaths. Just as Galileo said, “Mathematics is the alphabet with which God haswritten the universe”. Maths, in my eyes, is a fascinating subject that needsour passion and imagination. In the end I hope you love this boundless treasureand enjoy the magical world of maths!Thank you!
英语演讲稿2
In the flood of darkness, hope is the light. It brings comfort, faith, andconfidence.
It gives us guidance when we are lost, and gives support when we areafraid. And the moment we give up hope, we give up our lives. The world we livein is disintegrating into a place of malice and hatred, where we need hope andfind it harder.
In this world of fear, hope to find better, but easier said thandone, the more meaningful life of faith will make life meaningful.
英语演讲稿3
Ladies and gentlemen,
I have had a lot of teachers in my school who have given me much help in my study. For their help I will never forget them. But today I am going to talk about a special teacher of mine.
This teacher is not a human being and its name is“Computer”. It has been teaching me a lot of knowledge and I appreciate it very much.
With the development of modern science and technology, computers are widely used in every teritories [every field] including education. How can a computer be my teacher? How does a computer teach me? Multimedia(多媒体)helps a lot in this aspect in recent years, and computer-based training (CBT) has become a popular educational medium (手段).
Even before the multimedia come [came] up, many different learning systems appeared, using the components and techniques we now associate with the term “multimedia”.
Multimedia components, such as graphics (动画) , animations , sound and video, make the learning process easier through visualization. Animations can present many complex subjects dynamically, but human teachers can not do this on blackboards. Multimedia makes our study more lively and interesting.
For example, a CD-ROM disk named “Encarta Encyclopedia” contains 650 MB information including images, graphics, music clips, video clips, animations , texts, hotwords, and database search functions. Fields involved includes physical sciences, performance arts, social sciences, politics, military, education and so on. When pressing a button, I can hear American President Clinton's speech clip.
I may enjoy playing all kinds of musical instruments in the world. I can also see the animation of many physical phenomena. This makes physical concept to be understood deeply [ concepts understood better]. The audio features of multimedia can greatly help me learning [learn] foreign languages. With its speech output capabilities, I'm no longer dependent on an instructor for proper pronunciation.
How can I interact with a computer? There are many ways, including keyboard, mouse pointer, and touch screen. I often use a keyboard.
When I press right keys, I can see and hear whatever I want. Information world is at my fingertip. I wish that true speech input-output system would be invented one day.
As teachers, computers have a lot of virtues：They are positive, they have good memories and never lose any information stored in them.
They have much knowledge in every field. They can let out all kinds of sounds, and can also improve the efficiency of our study. For example, if I want to, I can skip some chapters so that I can study at my own pace.
Although computers will never take the place of human teachers, they are welcomed by more and more learners. Computers will continue to evolve(发展)with the aid of modern technologies.
Computers are so powerful, helpful and important that everybody needs it, especially in the future! I love my computer teacher!
Thank you.
英语演讲稿4
Good morning , boys and girls. I am pu lijuan and glad to give you a speech about stress.
Psychologist tell us that stress is a state of worry caused by the problem of living , such as too much work or study , heavy responsibilities .
Statistics show that stress comes from every detail in our life . Financial problems , poor health , being laid off may be the stress that most adults now are suffering . As students in the university , we are also under our special stress . While study , having to take various tests and submit a project against a deadline may put a great pressure on us . And the things that make us felt stressed may be our parents’s greater expectations on us than we could reach . Later , when we are likely to graduate , some other problems will also annoy us . I think we will worry a lot about our ability to compete in the job market and how we can best use what we’ve learned at college in our future job .
The chief problem we should face to is our attitude towards stress le usually say they can not live in the sun except they escape from stress . It’s unwelcome ! Yes , however , very necessary . Just image a world where stress does not exist and people lead their life in a very comfortable way . But is this kind of living condition as perfect as we hope ? Without
stress , they may feel very satisfied with the current life but lack of power to discover new things . Too much satisfaction result in nothing except a countermarch of the society . No stress , no development . So a certain amount of stress is good . It can stimulate us and increase our level of alertness .
And our answer to stress is another vital problem . How to do with ourselves when stress suddenly break into our life ? To wave the white flag and admit our unability , to give up to our ideality , or worsely , just to suicide as to put an end to everything … Of cause not . The principle is to tackle with stress gently and harmoniously. We should try our best to release ourselves . Such as to do some exercise , to listen to t music to ease our minds and to learn to view these changes of life as challenges ’s no use crying over spilt milk .
Only to accept what has happened can solve the problem , I think I was under large stress 5 minutes before , but now I am here and have finished my speech . Here is the last thing I want to add to my topic ,face to it and overcome it ,stress is also a piece of cake .
That is all . Thank you very much!
英语演讲稿5
Harry S. Truman: "The Truman Doctrine"
Mr. President, Mr. Speaker, Members of the Congress of the United States:
The gravity of the situation which confronts the world today necessitates my appearance before a joint session of the Congress. The foreign policy and the national security of this country are involved. One aspect of the present situation, which I present to you at this time for your consideration and decision, concerns Greece and Turkey. The United States has received from the Greek Government an urgent appeal for financial and economic assistance. Preliminary reports from the American Economic Mission now in Greece and reports from the American Ambassador in Greece corroborate the statement of the Greek Government that assistance is imperative if Greece is to survive as a free nation.
I do not believe that the American people and the Congress wish to turn a deaf ear to the appeal of the Greek Government. Greece is not a rich country. Lack of sufficient natural resources has always forced the Greek people to work hard to make both ends meet. Since 1940, this industrious, peace loving country has suffered invasion, four years of cruel enemy occupation, and bitter internal strife.
When forces of liberation entered Greece they found that the retreating Germans had destroyed virtually all the railways, roads, port facilities, communications, and merchant marine. More than a thousand villages had been burned. Eighty-five per cent of the children were tubercular. Livestock, poultry, and draft animals had almost disappeared. Inflation had wiped out practically all savings. As a result of these tragic conditions, a militant minority, exploiting human want and misery, was able to create political chaos which, until now, has made economic recovery impossible.
Greece is today without funds to finance the importation of those goods which are essential to bare subsistence. Under these circumstances, the people of Greece cannot make progress in solving their problems of reconstruction. Greece is in desperate need of financial and economic assistance to enable it to resume purchases of food, clothing, fuel, and seeds. These are indispensable for the subsistence of its people and are obtainable only from abroad. Greece must have help to import the goods necessary to restore internal order and security, so essential for economic and political recovery. The Greek Government has also asked for the assistance of experienced American administrators, economists, and technicians to insure that the financial and other aid given to Greece shall be used effectively in creating a stable and self-sustaining economy and in improving its public administration.
The very existence of the Greek state is today threatened by the terrorist activities of several thousand armed men, led by Communists, who defy the government's authority at a number of points, particularly along the northern boundaries. A Commission appointed by the United Nations security Council is at present investigating disturbed conditions in northern Greece and alleged border violations along the frontiers between Greece on the one hand and Albania, Bulgaria, and Yugoslavia on the other.
Meanwhile, the Greek Government is unable to cope with the situation. The Greek army is small and poorly equipped. It needs supplies and equipment if it is to restore authority of the government throughout Greek territory. Greece must have assistance if it is to become a self-supporting and self-respecting democracy. The United States must supply this assistance. We have already extended to Greece certain types of relief and economic aid. But these are inadequate. There is no other country to which democratic Greece can turn. No other nation is willing and able to provide the necessary support for a democratic Greek government.
The British Government, which has been helping Greece, can give no further financial or economic aid after March 31st. Great Britain finds itself under the necessity of reducing or liquidating its commitments in several parts of the world, including Greece.
We have considered how the United Nations might assist in this crisis. But the situation is an urgent one, requiring immediate action, and the United Nations and its related organizations are not in a position to extend help of the kind that is required.
It is important to note that the Greek Government has asked for our aid in utilizing effectively the financial and other assistance we may give to Greece, and in improving its public administration. It is of the utmost importance that we supervise the use of any funds made available to Greece in such a manner that each dollar spent will count toward making Greece self-supporting, and will help to build an economy in which a healthy democracy can flourish.
No government is perfect. One of the chief virtues of a democracy, however, is that its defects are always visible and under democratic processes can be pointed out and corrected. The Government of Greece is not perfect. Nevertheless it represents eighty-five per cent of the members of the Greek Parliament who were chosen in an election last year. Foreign observers, including 692 Americans, considered this election to be a fair expression of the views of the Greek people.
The Greek Government has been operating in an atmosphere of chaos and extremism. It has made mistakes. The extension of aid by this country does not mean that the United States condones everything that the Greek Government has done or will do. We have condemned in the past, and we condemn now, extremist measures of the right or the left. We have in the past advised tolerance, and we advise tolerance now.
Greek's neighbor, Turkey, also deserves our attention. The future of Turkey, as an independent and economically sound state, is clearly no less important to the freedom-loving peoples of the world than the future of Greece. The circumstances in which Turkey finds itself today are considerably different from those of Greece. Turkey has been spared the disasters that have beset Greece. And during the war, the United States and Great Britain furnished Turkey with material aid.
Nevertheless, Turkey now needs our support. Since the war, Turkey has sought financial assistance from Great Britain and the United States for the purpose of effecting that modernization necessary for the maintenance of its national integrity. That integrity is essential to the preservation of order in the Middle East. The British government has informed us that, owing to its own difficulties, it can no longer extend financial or economic aid to Turkey. As in the case of Greece, if Turkey is to have the assistance it needs, the United States must supply it. We are the only country able to provide that help.
I am fully aware of the broad implications involved if the United States extends assistance to Greece and Turkey, and I shall discuss these implications with you at this time. One of the primary objectives of the foreign policy of the United States is the creation of conditions in which we and other nations will be able to work out a way of life free from coercion. This was a fundamental issue in the war with Germany and Japan. Our victory was won over countries which sought to impose their will, and their way of life, upon other nations.
To ensure the peaceful development of nations, free from coercion, the United States has taken a leading part in establishing the United Nations. The United Nations is designed to make possible lasting freedom and independence for all its members. We shall not realize our objectives, however, unless we are willing to help free peoples to maintain their free institutions and their national integrity against aggressive movements that seek to impose upon them totalitarian regimes. This is no more than a frank recognition that totalitarian regimes imposed upon free peoples, by direct or indirect aggression, undermine the foundations of international peace, and hence the security of the United States.
The peoples of a number of countries of the world have recently had totalitarian regimes forced upon them against their will. The Government of the United States has made frequent protests against coercion and intimidation in violation of the Yalta agreement in Poland, Rumania, and Bulgaria. I must also state that in a number of other countries there have been similar developments.
At the present moment in world history nearly every nation must choose between alternative ways of life. The choice is too often not a free one. One way of life is based upon the will of the majority, and is distinguished by free institutions, representative government, free elections, guarantees of individual liberty, freedom of speech and religion, and freedom from political oppression. The second way of life is based upon the will of a minority forcibly imposed upon the majority. It relies upon terror and oppression, a controlled press and radio, fixed elections, and the suppression of personal freedoms.
I believe that it must be the policy of the United States to support free peoples who are resisting attempted subjugation by armed minorities or by outside pressures.
I believe that we must assist free peoples to work out their own destinies in their own way.
I believe that our help should be primarily through economic and financial aid which is essential to economic stability and orderly political processes.
The world is not static, and the status quo is not sacred. But we cannot allow changes in the status quo in violation of the Charter of the United Nations by such methods as coercion, or by such subterfuges as political infiltration. In helping free and independent nations to maintain their freedom, the United States will be giving effect to the principles of the Charter of the United Nations.
It is necessary only to glance at a map to realize that the survival and integrity of the Greek nation are of grave importance in a much wider situation. If Greece should fall under the control of an armed minority, the effect upon its neighbor, Turkey, would be immediate and serious. Confusion and disorder might well spread throughout the entire Middle East. Moreover, the disappearance of Greece as an independent state would have a profound effect upon those countries in Europe whose peoples are struggling against great difficulties to maintain their freedoms and their independence while they repair the damages of war.
It would be an unspeakable tragedy if these countries, which have struggled so long against overwhelming odds, should lose that victory for which they sacrificed so much. Collapse of free institutions and loss of independence would be disastrous not only for them but for the world. Discouragement and possibly failure would quickly be the lot of neighboring peoples striving to maintain their freedom and independence.
Should we fail to aid Greece and Turkey in this fateful hour, the effect will be far reaching to the West as well as to the East.
We must take immediate and resolute action. I therefore ask the Congress to provide authority for assistance to Greece and Turkey in the amount of $400,000,000 for the period ending June 30, 1948. In requesting these funds, I have taken into consideration the maximum amount of relief assistance which would be furnished to Greece out of the $350,000,000 which I recently requested that the Congress authorize for the prevention of starvation and suffering in countries devastated by the war.
In addition to funds, I ask the Congress to authorize the detail of American civilian and military personnel to Greece and Turkey, at the request of those countries, to assist in the tasks of reconstruction, and for the purpose of supervising the use of such financial and material assistance as may be furnished. I recommend that authority also be provided for the instruction and training of selected Greek and Turkish personnel. Finally, I ask that the Congress provide authority which will permit the speediest and most effective use, in terms of needed commodities, supplies, and equipment, of such funds as may be authorized. If further funds, or further authority, should be needed for purposes indicated in this message, I shall not hesitate to bring the situation before the Congress. On this subject the Executive and Legislative branches of the Government must work together.
This is a serious course upon which we embark. I would not recommend it except that the alternative is much more serious. The United States contributed $341,000,000,000 toward winning World War II. This is an investment in world freedom and world peace. The assistance that I am recommending for Greece and Turkey amounts to little more than 1 tenth of 1 per cent of this investment. It is only common sense that we should safeguard this investment and make sure that it was not in vain. The seeds of totalitarian regimes are nurtured by misery and want. They spread and grow in the evil soil of poverty and strife. They reach their full growth when the hope of a people for a better life has died.
We must keep that hope alive.
The free peoples of the world look to us for support in maintaining their freedoms. If we falter in our leadership, we may endanger the peace of the world. And we shall surely endanger the welfare of this nation.
Great responsibilities have been placed upon us by the swift movement of events.
I am confident that the Congress will face these responsibilities squarely.
英语演讲稿6
Good afternoon, everyone! The topic of my speech today is “Being a Good Listener”. Good listening can always show respect, promote understanding, and improve interpersonal relationship. Many people suggest that parents should listen more to their children, so they will understand them better, and find it easy to narrow the generation gap; teachers should listen more to their students, then they can meet their needs better, and place themselves in a good relationship with their students; students should listen more to their classmates, thus they will help and learn from each other, and a friendship is likely to be formed. What I want to stress is that each of us should listen more to others. Show your respect and never stop others till they finish their talk; show you are interested by a supportive silence or a knowing smile; be open-minded to different opinions even though you don’t like them. In a word, good listening can really enable us to get closer to each other. Thank you for your listening!
英语演讲稿7
Since the quality of honesty applies to all behaviors, one cannot refuse to consider factual information, for example, in an unbiased manner and still claim that one's knowledge, belief or position is an attempt to be truthful. Such a belie
f is clearly a product of one's desires and simply has nothing to do with the human ability to know. Basing one's positions on what one wants — rather than unbiased evidence gathering — is dishonest even when good intentions can be cited — after all even Hitler could cite good intentions and intended glory for a select group of people. Clearly then, an unbiased approach to the truth is a requirement of honesty.
Because intentions are closely related to fairness and certainly affect the degree of honesty/dishonesty, there is a wide spread confusion about honesty--and a general belief that being dishonest means that one ALWAYS correctly understands if their behavior is either honest or dishonest. Self-perception of our morality is non-static and volatile. It's often at the moment we refuse to consider other perspectives that there is a clear indication we are not pursuing the truth, rather than simply and exclusively at the moment we can muster up evidence that we are right. Socrates had much to say about truth, honesty and morality, and explained that if people really understood that their behavior was wrong — then they simply wouldn't do it — by definition. Unfortunately, honesty in the western tradition has been marginalized to specific instances — perhaps because a thorough understanding of honesty collides with ideologies of all types. Ideologies and idealism often exaggerate and suppress evidence in order to support their perspectives — at the eXPense of the truth. This process erodes the practice and understanding of honesty. To an ideologist the truth quite often becomes insignificant, what matters most are their ideals and what ever supports their desires to enjoy and spread those ideals.
Human beings are inherently biased about what they believe to be good due to individual tastes & backgrounds, but once one understands that a decidedly biased approach to what is true — is inherently dishonest, one can also understand how idealism and ideology have poorly served the quest for an honest, moral society. Both honesty and morality require that we base our opinions about what is good — upon unbiased ideas of what is TRUE — rather than vice versa (determining what is true based on what we feel is good) — the way all ideologies would have us believe.
英语演讲稿8
dear all,
more than 100 years ago, our neighbor japan, through the meiji restoration of road leading onto the bourgeois, than the overall national strength of china. thus, once the chinese subsidiary are resource-poor small countries begin coveted chinese jiangshan magnificent vast territory and abundant resources, they again and again by force of aggression against china, while our once great country of at this time can only be allowed to bully, because of their weak we simply can not carry out a powerful enemy resistance.
fortunately, justice will eventually defeat evil. from 1937 to 1945, the chinese people with a full eight years to give the military aggression of japanese militarism hard to combat, frenzied japanese militarism in solidarity the people and the chinese all over the world anti-fascist front of the people of the country has to the tail and bowed her head. therefore, we can say that anti-fascist war, win the entire chinese nation are a major event in the history, it is the chinese people settle down, proud of the start, but also the chinese nation "sick man of east asia" signs, re-stand the nation in the world forest beginning.
unfortunately, such a promising start did not go smoothly. civil war, the cultural revolution, after the war the whole world especially in asia, much of the country's economic take-off our first opportunity missed, china's development has experienced frustrations. although our lives today and has international status and sixty years ago is quite different, but we are not on the true meaning of the "big country", our comprehensive national strength with japan still has a big gap between. it is for this reason, japan has always been an arrogant attitude towards china, at the sixtieth anniversary of the victory of the anti-fascist war today, their governments at a correct view of history on the problem is still ambiguous attitude, prime minister junichiro koizumi's repeated visits to yasukuni shrine, members of parliament openly deny the class-a war criminals crimes. comrades, fellow students, please close your eyes, you heard right, in the war for the country sacrificed their lives for the soul of the soldiers shouted at, in the war of 35000000冤死at the soul of the people crying ... ...
say there is a famous saying goes: to forgive, but not to forget. on the one hand, in the country, national and even personal relations, grievances things everywhere, such as the heart of no forgiveness, no redress for their grievances will be translated into phase reported. on the other hand, the historical facts and should not forget the lessons of history. history will not be easy to repeat, the new framework of international relations, hysterical militarism no longer the market. but at the same time we must recognize that the war more than 60 years ago not far away from us, was the reason why japan and france blatant and wanton aggression against china, because chinese are totally weak poor, economically backward, and today, cause of war and disaster cultural genes, there are still benefits-driven, people need to remain vigilant.
at present, the third technological revolution in full swing, leap in the development of the world economy, increasingly close contact with the world the chinese are facing the best opportunity for economic development, history tells us that peace and stability in order for us to seize opportunities zhongxing of the chinese nation. on the occasion of the sixtieth anniversary of the victory of war of resistance against japan, i think of you teachers, colleagues and students, said: war and revenge will not win our respect, unremitting, and this is our victory to celebrate, hold a memorial ceremony for martyrs, and bearing in mind the history of the best way!
thank you!
英语演讲稿9
Bowed their heads and tight stick the screen Beware of high myopia heredity of the next generation to lift your head!
Much of the 3 c products into their lives especially in intelligent mobile phone in the past two years show explosive growth portable convenience makes the notebook computer also gradually replaced so make many rely on the mobile phone addiction "down". Ophthalmologist said a long time with the result of the eye not only easy to let myopia deepen a few baidu and high myopia patients is likely to myopia passed on to the next generation!
High myopia is myopic degree more than 600 degrees these patients are usually long time focus on close work such as the 3 c product screen or book excessive use of the ciliary muscle of the eye make the ocular axial length increased lead to myopic degree is deepened fast. Now common to many teenagers or children get cell phone watch movies or playing online games.
Ophthalmologist Chen Yichuan pointed out that the development of the eyes can't afford to height in using load degree it is easy to soar high myopia rate observed in recent years schoolchildren continue to increase in addition to academic pressure is still heavy and often use the computer or mobile phone is also a reason. In addition if parents have already high myopia the next generation is also very prone to myopia genetic constitution.
Traditional treatment of high myopia will use the ciliary muscle relaxant and also is often said that the mydriatic agent. Excessive use of eye because work can lead to a temporary increase degree actually you can resume after the break use potions can be forced to relax ciliary muscle. But the use of mydriatic agent there may be other issues such as eye contact too much ultraviolet light during the day prone to photophobia symptoms pupil loose big will make elevated intraocular pressure may cause glaucoma. In addition there have some genetic constitution height myopia for a mydriatic agent effect is not obvious.
There are more and more people choose corneal shape the use of night sleep wear hard contact lenses to correct degree this kind of contact lens lens inside coils of different radian design. The patients sleep in the night time to wear the glasses can slowly to set the radian of corneal surface shape radian after the change of the cornea for people who often want to close your eyes also can prevent eye axis will not increase and replace the old order mydriatic agent achieve the goal of control myopia.
Chen Yichuan physician said usually 600 degrees myopia people wearing corneal shape lenses at least two weeks can achieve the result of the day does not need to wear glasses. Note that corneal shape lenses or should pay attention to cleaning and maintenance or like contact lenses will cause inflammation infection should be under the supervision of professional ophthalmologist fitting in order to ensure its safety and effectiveness.
Prevention of myopia good way or a correct habit including the correct posture his eyes from the book or the screen to 30 cm distance maintain the habit of 30 minutes to rest for at least 5 minutes can make the adjustment of the eye muscle rest adequately and sufficient sleep as much as possible don't stay up late to watch TV computer or mobile phone.
The furthest distance in the world is I in your side you are playing with mobile phones.
According to the survey 77% of people on 12 or more hours a day 33.55% of people on 24 hours 65% of people said: if the phone is not in the side will be very anxious.
This is a kind of disease! Bow "mobile phone" please leave some time each day to family and friends face to face talk!
英语演讲稿10
Winter was gone,spring comes.I love spring best,because it's spring,the weather is aways sunny and rainy,it's not cold and nothot,it's warmer and flowers begin to open and the trees begin to birds are singing in the sky,they are animals will go out people like to go out and enjoy the sunshine.I like wearing my sweaterand jeans, I like to fly kites,plant trees and see the beautiful flowers. Springis colorful,I think it's a wonderful season. What's your favourite season?Pleasetell me.
英语演讲稿11
honorable judges and dear fellow students,
just as most people here,when i first saw the topic reform and opening-up policies,a voice came out,saying what a grand scale!then those big events,such as china's accession to wto,the launch of shenzhou and the submersion of jiaolong flashed through my mind.however,at this moment i stand on the stage as a member of chinese youth,i'm not gonna draw a magnificent blueprint for you.what i exactly want is to find out the relation between chinese youth and this era of reform and opening-up.
it is known to all that in the past 40 years,china has captured the opportunity provided by globalization and grown rapidly from nobody to the second-largest economy in the world.in this context,it could be said that we young people have had better resources than ever before.to be more specific,let's pick up some daily life's fragments: for example,one sunday morning,you don't feel like going outside,so you pull out your smartphone and quickly order a takeout on app to comfort your empty stomach.in another case ,there's been a discount on taobao .after struggling with your equipment and the net speed,you finally got your favorite goods at the best prize,because the most complete supply chain and logistic chain worldwide will solve the remaining work for you,so all you have to do is waiting. not to mention the increasing number of people going abroad,with a chinese passport,they are entitled to travel around the world and come back home safely.
but now i wonder how many of you have realized that this convenience,this sense of security does't come out of air,surely we could regard it as the product of reform and opening-up policies,nevertheless,do you really understand what are behind those achievements?there is a saying, if you live at ease , that is because there are a great many people who are working for you in silence.they might be the politicians and entrepreneurs who climb into the raging flow to explore and promote the system construction of market economy,they might be the intellectuals who devote their lives to prompting the engine of development,and they might be every single person we have access to.
in other words,we youth do not take it for granted,the more resources we possess means the more responsibility we will shoulder.when the 95s were claimed to be the new youth in china and the first millennial stepped into campus,baton of the era has also been approaching.although china is moving firmly towards its goal of rejuvenation ,deficiencies and problems still exist.so in this sense,we youth ought to grow stronger to sustain the potentiality of development.with the baton in hands,do not afraid to embrace the mercurial society ,do not afraid to change the future.so that as the new youth we could feel more emboldened to say that facing the reform and opening-up policies we are not only the gainers but also the successors!thank you!
英语演讲稿12
a window is opened up at the crack of dawn, beside which one man is overlooking the the mess of buildings outside, breathing the fresh air cosily. but just after a little while, he steps to his seat, staring at the computer screen till the night. this man is very likely a programmer.
there is a man who concentrates on his computer, but doesn’t care about however he dresses, or even whether he washes his face. there is a man who has a good knowledge of computer language, but has a low eq and makes a bad relationship with others.
there is a man who stays at home and does his own work by himself day and night, but just has few friends.
these images shown above probably are what people think of
programmers as, in fact, programmers indeed give us a bad impression sometimes. however, people just have a partial understanding of programmers’ life, not to mention that they can know the fun of programming. there is no doubt that programs affect all aspects of our lives in an obvious or potential way, especially they are reflected in electronic products that we use nowadays.
when you are so proud of possessing an iphone, you’d better
remember that it is the program that makes you get confidence to show off the advanced mobile phones thoroughly.
when you take advantage of computers to cope with problems in life, you’d better remember that it is the program that makes you seek the convenience of computer.
when you needn’t worry about hot summer and cold winter owing to an air-conditioner, you’d better remember that it is the program that makes you share the machine’s intelligent.
when you release your pressure by playing varies of online games, you’d better remember that it is the program that makes you enjoy the great entertainment in life.
as people’s thoughts control their bodies, computer programs play a leading role in the modern times. both social progress and human evolution depend on the computer programs. in the practical application, a software consists of different programs and then
combines with hardware to develop into a high-tech electronic product. there are many kinds of electronic products found everywhere in our daily life. nearly all the time do we make use of these products to conduct our passion.
yes, it is definitely right that programming is a hard work because of its special characteristics---complicated, time-wasted,
logical. to make a program needs our continual patient and confidence, and we should accept failure again and again in most cases. but once you go into further understanding of computer programs, you will be surprised at the programs’ wander. in detail, through programming a heap of date or a computing model can be easily solved we expected, such as a number wanted, or the model’s parameters. the magical power of program appeals to all the programmers, certainly including me.
it is of great convenience for us to simplify or model our complex questions by programming. furthermore, studying and using programs can enforce us to form our ability of analyzing and logic.
英语演讲稿13
What I'd like to do today is talk about one of my favorite subjects, and that is the neuroscience of sleep.
Now, there is a sound -- (Alarm clock) -- aah, it worked -- a sound that is desperately, desperately familiar to most of us, and of course it's the sound of the alarm clock. And what that truly ghastly, awful sound does is stop the single most important behavioral experience that we have, and that's sleep. If you're an average sort of person, 36 percent of your life will be spent asleep, which means that if you live to 90, then 32 years will have been spent entirely asleep.
Now what that 32 years is telling us is that sleep at some level is important. And yet, for most of us, we don't give sleep a second thought. We throw it away. We really just don't think about sleep. And so what I'd like to do today is change your views, change your ideas and your thoughts about sleep. And the journey that I want to take you on, we need to start by going back in time.
"Enjoy the honey-heavy dew of slumber." Any ideas who said that? Shakespeare's Julius Caesar. Yes, let me give you a few more quotes. "O sleep, O gentle sleep, nature's soft nurse, how have I frighted thee?" Shakespeare again, from -- I won't say it -- the Scottish play. [Correction: Henry IV, Part 2] (Laughter) From the same time: "Sleep is the golden chain that ties health and our bodies together." Extremely prophetic, by Thomas Dekker, another Elizabethan dramatist.
But if we jump forward 400 years, the tone about sleep changes somewhat. This is from Thomas Edison, from the beginning of the 20th century. "Sleep is a criminal waste of time and a heritage from our cave days." Bang. (Laughter) And if we also jump into the 1980s, some of you may remember that Margaret Thatcher was reported to have said, "Sleep is for wimps." And of course the infamous -- what was his name? -- the infamous Gordon Gekko from "Wall Street" said, "Money never sleeps."
What do we do in the 20th century about sleep? Well, of course, we use Thomas Edison's light bulb to invade the night, and we occupied the dark, and in the process of this occupation, we've treated sleep as an illness, almost. We've treated it as an enemy. At most now, I suppose, we tolerate the need for sleep, and at worst perhaps many of us think of sleep as an illness that needs some sort of a cure. And our ignorance about sleep is really quite profound.
Why is it? Why do we abandon sleep in our thoughts? Well, it's because you don't do anything much while you're asleep, it seems. You don't eat. You don't drink. And you don't have sex. Well, most of us anyway. And so therefore it's -- Sorry. It's a complete waste of time, right? Wrong. Actually, sleep is an incredibly important part of our biology, and neuroscientists are beginning to explain why it's so very important. So let's move to the brain.
Now, here we have a brain. This is donated by a social scientist, and they said they didn't know what it was, or indeed how to use it, so -- (Laughter) Sorry. So I borrowed it. I don't think they noticed. Okay. (Laughter)
The point I'm trying to make is that when you're asleep, this thing doesn't shut down. In fact, some areas of the brain are actually more active during the sleep state than during the wake state. The other thing that's really important about sleep is that it doesn't arise from a single structure within the brain, but is to some extent a network property, and if we flip the brain on its back -- I love this little bit of spinal cord here -- this bit here is the hypothalamus, and right under there is a whole raft of interesting structures, not least the biological clock. The biological clock tells us when it's good to be up, when it's good to be asleep, and what that structure does is interact with a whole raft of other areas within the hypothalamus, the lateral hypothalamus, the ventrolateral preoptic nuclei. All of those combine, and they send projections down to the brain stem here. The brain stem then projects forward and bathes the cortex, this wonderfully wrinkly bit over here, with neurotransmitters that keep us awake and essentially provide us with our consciousness. So sleep arises from a whole raft of different interactions within the brain, and essentially, sleep is turned on and off as a result of a range of
Okay. So where have we got to? We've said that sleep is complicated and it takes 32 years of our life. But what I haven't explained is what sleep is about. So why do we sleep? And it won't surprise any of you that, of course, the scientists, we don't have a consensus. There are dozens of different ideas about why we sleep, and I'm going to outline three of those.
The first is sort of the restoration idea, and it's somewhat intuitive. Essentially, all the stuff we've burned up during the day, we restore, we replace, we rebuild during the night. And indeed, as an explanation, it goes back to Aristotle, so that's, what, 2,300 years ago. It's gone in and out of fashion. It's fashionable at the moment because what's been shown is that within the brain, a whole raft of genes have been shown to be turned on only during sleep, and those genes are associated with restoration and metabolic pathways. So there's good evidence for the whole restoration hypothesis.
What about energy conservation? Again, perhaps intuitive. You essentially sleep to save calories. Now, when you do the sums, though, it doesn't really pan out. If you compare an individual who has slept at night, or stayed awake and hasn't moved very much, the energy saving of sleeping is about 110 calories a night. Now, that's the equivalent of a hot dog bun. Now, I would say that a hot dog bun is kind of a meager return for such a complicated and demanding behavior as sleep. So I'm less convinced by the energy conservation idea.
But the third idea I'm quite attracted to, which is brain processing and memory consolidation. What we know is that, if after you've tried to learn a task, and you sleep-deprive individuals, the ability to learn that task is smashed. It's really hugely attenuated. So sleep and memory consolidation is also very important. However, it's not just the laying down of memory and recalling it. What's turned out to be really exciting is that our ability to come up with novel solutions to complex problems is hugely enhanced by a night of sleep. In fact, it's been estimated to give us a threefold advantage. Sleeping at night enhances our creativity. And what seems to be going on is that, in the brain, those neural connections that are important, those synaptic connections that are important, are linked and strengthened, while those that are less important tend to fade away and be less important.
Okay. So we've had three explanations for why we might sleep, and I think the important thing to realize is that the details will vary, and it's probable we sleep for multiple different reasons. But sleep is not an indulgence. It's not some sort of thing that we can take on board rather casually. I think that sleep was once likened to an upgrade from economy to business class, you know, the equiavlent of. It's not even an upgrade from economy to first class. The critical thing to realize is that if you don't sleep, you don't fly. Essentially, you never get there, and what's extraordinary about much of our society these days is that we are desperately sleep-deprived.
So let's now look at sleep deprivation. Huge sectors of society are sleep-deprived, and let's look at our sleep-o-meter. So in the 1950s, good data suggests that most of us were getting around about eight hours of sleep a night. Nowadays, we sleep one and a half to two hours less every night, so we're in the six-and-a-half-hours-every-night league. For teenagers, it's worse, much worse. They need nine hours for full brain performance, and many of them, on a school night, are only getting five hours of sleep. It's simply not enough. If we think about other sectors of society, the aged, if you are aged, then your ability to sleep in a single block is somewhat disrupted, and many sleep, again, less than five hours a night. Shift work. Shift work is extraordinary, perhaps 20 percent of the working population, and the body clock does not shift to the demands of working at night. It's locked onto the same light-dark cycle as the rest of us. So when the poor old shift worker is going home to try and sleep during the day, desperately tired, the body clock is saying, "Wake up. This is the time to be awake." So the quality of sleep that you get as a night shift worker is usually very poor, again in that sort of five-hour region. And then, of course, tens of millions of people suffer from jet lag. So who here has jet lag? Well, my goodness gracious. Well, thank you very much indeed for not falling asleep, because that's what your brain is craving.
One of the things that the brain does is indulge in micro-sleeps, this involuntary falling asleep, and you have essentially no control over it. Now, micro-sleeps can be sort of somewhat embarrassing, but they can also be deadly. It's been estimated that 31 percent of drivers will fall asleep at the wheel at least once in their life, and in the U.S., the statistics are pretty good: 100,000 accidents on the freeway have been associated with tiredness, loss of vigilance, and falling asleep. A hundred thousand a year. It's extraordinary. At another level of terror, we dip into the tragic accidents at Chernobyl and indeed the space shuttle Challenger, which was so tragically lost. And in the investigations that followed those disasters, poor judgment as a result of extended shift work and loss of vigilance and tiredness was attributed to a big chunk of those disasters.
So when you're tired, and you lack sleep, you have poor memory, you have poor creativity, you have increased impulsiveness, and you have overall poor judgment. But my friends, it's so much worse than that.
(Laughter)
If you are a tired brain, the brain is craving things to wake it up. So drugs, stimulants. Caffeine represents the stimulant of choice across much of the Western world. Much of the day is fueled by caffeine, and if you're a really naughty tired brain, nicotine. And of course, you're fueling the waking state with these stimulants, and then of course it gets to 11 o'clock at night, and the brain says to itself, "Ah, well actually, I need to be asleep fairly shortly. What do we do about that when I'm feeling completely wired?" Well, of course, you then resort to alcohol. Now alcohol, short-term, you know, once or twice, to use to mildly sedate you, can be very useful. It can actually ease the sleep transition. But what you must be so aware of is that alcohol doesn't provide sleep, a biological mimic for sleep. It sedates you. So it actually harms some of the neural proccessing that's going on during memory consolidation and memory recall. So it's a short-term acute measure, but for goodness sake, don't become addicted to alcohol as a way of getting to sleep every night.
Another connection between loss of sleep is weight gain. If you sleep around about five hours or less every night, then you have a 50 percent likelihood of being obese. What's the connection here? Well, sleep loss seems to give rise to the release of the hormone ghrelin, the hunger hormone. Ghrelin is released. It gets to the brain. The brain says, "I need carbohydrates," and what it does is seek out carbohydrates and particularly sugars. So there's a link between tiredness and the metabolic predisposition for weight gain.
Stress. Tired people are massively stressed. And one of the things of stress, of course, is loss of memory, which is what I sort of just then had a little lapse of. But stress is so much more. So if you're acutely stressed, not a great problem, but it's sustained stress associated with sleep loss that's the problem. So sustained stress leads to suppressed immunity, and so tired people tend to have higher rates of overall infection, and there's some very good studies showing that shift workers, for example, have higher rates of cancer. Increased levels of stress throw glucose into the circulation. Glucose becomes a dominant part of the vasculature and essentially you become glucose intolerant. Therefore, diabetes 2. Stress increases cardiovascular disease as a result of raising blood pressure. So there's a whole raft of things associated with sleep loss that are more than just a mildly impaired brain, which is where I think most people think that sleep loss resides.
So at this point in the talk, this is a nice time to think, well, do you think on the whole I'm getting enough sleep? So a quick show of hands. Who feels that they're getting enough sleep here? Oh. Well, that's pretty impressive. Good. We'll talk more about that later, about what are your tips.
So most of us, of course, ask the question, "Well, how do I know whether I'm getting enough sleep?" Well, it's not rocket science. If you need an alarm clock to get you out of bed in the morning, if you are taking a long time to get up, if you need lots of stimulants, if you're grumpy, if you're irritable, if you're told by your work colleagues that you're looking tired and irritable, chances are you are sleep-deprived. Listen to them. Listen to yourself.
What do you do? Well -- and this is slightly offensive -- sleep for dummies: Make your bedroom a haven for sleep. The first critical thing is make it as dark as you possibly can, and also make it slightly cool. Very important. Actually, reduce your amount of light exposure at least half an hour before you go to bed. Light increases levels of alertness and will delay sleep. What's the last thing that most of us do before we go to bed? We stand in a massively lit bathroom looking into the mirror cleaning our teeth. It's the worst thing we can possibly do before we went to sleep. Turn off those mobile phones. Turn off those computers. Turn off all of those things that are also going to excite the brain. Try not to drink caffeine too late in the day, ideally not after lunch. Now, we've set about reducing light exposure before you go to bed, but light exposure in the morning is very good at setting the biological clock to the light-dark cycle. So seek out morning light. Basically, listen to yourself. Wind down. Do those sorts of things that you know are going to ease you off into the honey-heavy dew of slumber.
Okay. That's some facts. What about some myths?
Teenagers are lazy. No. Poor things. They have a biological predisposition to go to bed late and get up late, so give them a break.
We need eight hours of sleep a night. That's an average. Some people need more. Some people need less. And what you need to do is listen to your body. Do you need that much or do you need more? Simple as that.
Old people need less sleep. Not true. The sleep demands of the aged do not go down. Essentially, sleep fragments and becomes less robust, but sleep requirements do not go down.
And the fourth myth is, early to bed, early to rise makes a man healthy, wealthy and wise. Well that's wrong at so many different levels. (Laughter) There is no, no evidence that getting up early and going to bed early gives you more wealth at all. There's no difference in socioeconomic status. In my experience, the only difference between morning people and evening people is that those people that get up in the morning early are just horribly smug.
(Laughter) (Applause)
Okay. So for the last part, the last few minutes, what I want to do is change gears and talk about some really new, breaking areas of neuroscience, which is the association between mental health, mental illness and sleep disruption. We've known for 130 years that in severe mental illness, there is always, always sleep disruption, but it's been largely ignored. In the 1970s, when people started to think about this again, they said, "Yes, well, of course you have sleep disruption in schizophrenia because they're on anti-psychotics. It's the anti-psychotics causing the sleep problems," ignoring the fact that for a hundred years previously, sleep disruption had been reported before anti-psychotics.
So what's going on? Lots of groups, several groups are studying conditions like depression, schizophrenia and bipolar, and what's going on in terms of sleep disruption. We have a big study which we published last year on schizophrenia, and the data were quite extraordinary. In those individuals with schizophrenia, much of the time, they were awake during the night phase and then they were asleep during the day. Other groups showed no 24-hour patterns whatsoever. Their sleep was absolutely smashed. And some had no ability to regulate their sleep by the light-dark cycle. They were getting up later and later and later and later each night. It was smashed.
So what's going on? And the really exciting news is that mental illness and sleep are not simply associated but they are physically linked within the brain. The neural networks that predispose you to normal sleep, give you normal sleep, and those that give you normal mental health are overlapping. And what's the evidence for that? Well, genes that have been shown to be very important in the generation of normal sleep, when mutated, when changed, also predispose individuals to mental health problems. And last year, we published a study which showed that a gene that's been linked to schizophrenia, which, when mutated, also smashes the sleep. So we have evidence of a genuine mechanistic overlap between these two important systems.
Other work flowed from these studies. The first was that sleep disruption actually precedes certain types of mental illness, and we've shown that in those young individuals who are at high risk of developing bipolar disorder, they already have a sleep abnormality prior to any clinical diagnosis of bipolar. The other bit of data was that sleep disruption may actually exacerbate, make worse the mental illness state. My colleague Dan Freeman has used a range of agents which have stabilized sleep and reduced levels of paranoia in those individuals by 50 percent.
So what have we got? We've got, in these connections, some really exciting things. In terms of the neuroscience, by understanding the neuroscience of these two systems, we're really beginning to understand how both sleep and mental illness are generated and regulated within the brain. The second area is that if we can use sleep and sleep disruption as an early warning signal, then we have the chance of going in. If we know that these individuals are vulnerable, early intervention then becomes possible. And the third, which I think is the most exciting, is that we can think of the sleep centers within the brain as a new therapeutic target. Stabilize sleep in those individuals who are vulnerable, we can certainly make them healthier, but also alleviate some of the appalling symptoms of mental illness.
So let me just finish. What I started by saying is take sleep seriously. Our attitudes toward sleep are so very different from a pre-industrial age, when we were almost wrapped in a duvet. We used to understand intuitively the importance of sleep. And this isn't some sort of crystal-waving nonsense. This is a pragmatic response to good health. If you have good sleep, it increases your concentration, attention, decision-making, creativity, social skills, health. If you get sleep, it reduces your mood changes, your stress, your levels of anger, your impulsivity, and your tendency to drink and take drugs. And we finished by saying that an understanding of the neuroscience of sleep is really informing the way we think about some of the causes of mental illness, and indeed is providing us new ways to treat these incredibly debilitating conditions.
Jim Butcher, the fantasy writer, said, "Sleep is God. Go worship." And I can only recommend that you do the same.
Thank you for your attention.
(Applause)
英语演讲稿14
my name is Sam , for those of you in the assembly that don’t know me, i am in year ………. ( may also say if they are representing the src or other group in the school etc).
i am not sure how many of you realise that today marks a very important worldwide celebration for children. today is universal children’s day. so what, you may say, what does this mean to me, and why should i even bother to listen?
well the answer is very simple, as students in china we live a life of privilege and relative safety compared to children and young people in many other parts of the world. we are very lucky. but this shouldn’t mean that we don’t care about other children and communities around the world less fortunate than ourselves.
i think some classes have been learning about how students just like us in other parts of the world have to struggle to survive. some children cant afford the things we take for granted like food, clothing, safe water and sanitation and having the opportunity to go to school.
today is a day set aside to promote worldwide unity between children and to increase the awareness by all people of the plight of vulnerable children in some parts of the world.
in nsw, we are calling our contribution to universal children's day, unicef day for change. as part of this day, our school is doing..(brief description of activity).
on behalf of the students and staff who have put time into planning this activity, i would like to thank you in advance for your support.
thank you
英语演讲稿15
Dear：
I have many example，I want to be rich in the future. ThereforeI can buy all what I want.
But my greatest dream is that I want to be an football I want tolead the Chinese team won the World Cup Our country develops fast and our sportmake great progress in the last several decades. It has great achievements. Allof our country are proud of it. Therefore I want to be one of this amazingarea.
In order to make my dream come true I must study hard now. I hope my dreamcan come true one day.