我钥匙掉这附近某个地方了在附近，使渡过使穿过传送做完结束走完，这个工作必须在规定的时间内完成，吸烟有害健康是大家公认的公认的为公众所接受的，实践的实用的注重实际的有实际工作能力的。
英语句子!带单词版
第一课（1-94）
我很宽裕，能帮助她plenty['plenti]n.充裕,大量
beabletov.能,会
他是一个能人。able['eibl]adj.有本事的
我钥匙掉这附近某个地方了somewhereabout在…附近
drop[drp]vt.&vi.(使)落下,投下n.滴,滴状物
火灾是由一只丢弃的烟头引起的。becausedby由…引起
放下所有手头上的事，到这儿来＃drop[drp]vt.放弃,断绝交往漏掉
getover(使)渡过,(使)穿过；传送；做完…,结束走完
克服;克制从…中恢复过来
她进入房间时，他压低了声音。drop[drp]vt.&vi.(使)落下,投下(使)降低,减少,减弱
pre-taxprofitsdroppedby37percent.税前利润减少了37%。tax[tks]vt.向…征税n.税,税额
profit['prfit]n.利润益处vt.&vi.获益;得利于
drop[drp]vt.&vi.(使)降低,减少
percent[p'sent]n.百分之…,百分比
过去几年以来旅游业滑坡了。tourism['tur,izm]n.旅游；旅游业
dropoff落下;不知不觉入睡;送下车;送到;减少
drop[drp]vt.断绝交往
pressure['pre]n.压(力),压强;强制,压迫
我面临着来自家人和朋友的压力，他们要我与芭芭拉断绝关系。他在经销店将货物卸下。drop[drp]vt.卸下货物（尤指在途中）卸（客，货）
dealer['di:l]n.商人
他妈妈让他下了车，然后开车去上班了。drop[drp]vt.让人下车
你有空把它丢进邮筒就行了。
雨滴开始溅到地上。splash[spl]n.溅泼声;溅上的斑点
vt.使(液体)溅起vi.(指液体)溅落
onthegroundadv.在地上,当场
一滴水也看不见。insightadv.被看到
告诉我关于这件事的一切allabout关于…的一切;到处
他即将动身beabouttov.将要,正打算
start[stɑ:t]vt.&vi.出发;启程
现在是六点钟左右about['baut]adv.大约,差不多
孩子们到处乱闯rush[r]vt.&vi.n.冲,奔
我的卧室就在上面above['bv]adv.在上面/上述
太阳升到地平线上riseabove升到…之上
horizon[h'raizn]n.地平线；范围；眼界
rise[raiz]vi.n.上升,升起/增加,增长
她想离开家，开阔眼界。Broaden['br:dn]vt.&vi.使…变宽,拓展
broad[br:d]adj.宽的,阔的;广的
horizon[h'raizn]n.地平线；眼界
可能会有麻烦了。onthehorizon几乎肯定会很快发生的;即将来临
horizon[h'raizn]n.地平线；范围；眼界
这本书对我来说是太难了。beabove超出…之外
他不屑为自己谋私利。beabove不屑于
profit['prfit]n.利润,收益
比尔拒绝对那次事故承担责任。takefor为…承担…
refuse[ri'fju:z]vt.&vi.拒绝n.垃圾
responsibility[ri,spns'biliti]n.责任(感),职责
我只是认为你已知道了这件事。takefor信以为真;认为理所当然
takesomeoneorsomethingforgranted认为…是理所当然
granted['grɑ:ntid]认为…是理所当然的；对…想当然
grant[ɡrɑ:nt]vt.准许;答应给予/承认n.补助金,助学金,津贴
人们不再对基督教一切信以为真Christianity[,kristi:'niti:]n.基督教
grant[ɡrɑ:nt]n.助学金,津贴在这一地区居住满三年，就可以得到一笔补助金。看前面举的例子。
given['ɡivn]adj.规定的,特定的
prep.(表示原因)考虑到/(表示假设)倘若;假定
above['bv]adv.在上面/以上/上述
这个工作必须在规定的时间内完成。within[wi'in]adj.(表示时间)不超过
given['ɡivn]adj.规定的,特定的
giventime给定时间
他们要在规定的时间和地点会晤。meet[mi:t]vt.&vi.遇见,碰见,相见/认识,结识
vt.迎接/满足n.运动会,比赛
窗帘中间拉不拢。
Curtain['k:tn]n.窗帘failto未能…
inthemiddle在中部
middle['midl]n.adj.中部的;中间的
我们经常通信,却很少见面。regularly['regjulli]adv.有规律地定期地
seldom['seldm]adv.很少,罕见,难得
我碰见她和约翰走在一起。
walkwith与(某人)作伴行走
我跟她只是面熟,但并不认识。knowbysight会过面
来参加晚宴,认识一下我妹妹。
他的行为一直无可质疑
conduct[kn'dkt]n.举止,行为
abovesuspicionadv.无可怀疑
suspicion[ss'pin]n.怀疑,猜疑
always[':lweiz]adv.总是;永远;一直
警察是不许接受酬金的
police[p'li:s]n.警察
reward[ri'w:d]n.报酬vt.酬谢,奖赏
accept[k'sept]vt.&vi.接受,收受
allow['lau]vt.允许,许可(做某事)
他们承认了对这次事故所负的责任。accept[k'sept]vt.承认,同意
responsibility[ri,spns'biliti]n.责任（感）职责
14.Itisgenerallyacceptedthatsmokingisharmfultoourhealth.吸烟有害健康是大家公认的Accepted[k'septid]adj.公认的；为公众所接受的
Generally['denrli]adv.大体上,广泛地,普遍地
Record[ri'k:d]n.记录,记载/履历;功过
borrow['bru]vt.&vi.借,借进
return[ri't:n]vt.还,归还,退回
library['laibrri]n.图书馆,藏书室;藏书
thebooksyouhaveborrowed…你借的书…根据我们的记录，你借的书现在应该还给图书馆了。从这些数字看，我们的公司经营得不错according['k:di]adv.依照
dowellv.做得好,进展好
figure['fiɡ]n.数字,图解,图表
finger['fiɡ]n.手指
Account['kaunt]n.账户with[wi]prep.(表示关系)和…在一起
他因为生病，所以才缺席illness['ilnis]n.疾病
accountfor说明〔解释〕…原因
account['kaunt]vi.解释;说明
absence['bsns]n.缺席,不在场
一个人未证明有罪前，视为是清白的。account['kaunt]vt.认为
innocent['insnt]adj.清白无辜的
proven['pru:vn]adj.经过验证或证实的
prove[pru:v]vt.证明/检验;试验
guilty['ɡilti]adj.内疚的有罪的
我们拥有一百英亩农田。own[un]vt.拥有；承认
acre['eik]n英亩
farmland['fɑ:m,lnd]n.农田,耕地
你能游到河的对岸吗？Across['krs]prep.(表示位置)在…对面
Swim[swim]vt.&vi.n.游泳vi.眩晕
两条线相交。
Cut[kt]vt.(直线)与(另一条直线)相交
acro['krs]adv.成十字形,成交叉状
23.ParliamenthaspassedanActforbiddingthekillingofrareanimals.parliament['pɑ:lmnt]n.议会,国会
act[kt]n.法令,条例/forbid[f'bid]vt.禁止
rare[r]adj.稀少的；稀薄的
rareanimals.珍稀动物国会通过了一项法令,禁止捕杀珍稀动物。(Lookbeforeyouleap)三思后行。
act[kt]vt.&vi.行动,做
leap[li:p]vi.vt.n.跳跃,飞跃;激增
25.Actionsspeaklouderthanwords.行动胜于空谈;事实胜于雄辩loud[laud]adv.响亮地,大声地
action['kn]n.活动,行为;情节/作用,功能
战斗持续了三个小时。last[lɑ:st]vi.延续;继续
action['kn]n.行动,活动
他加了些木柴，使火旺些add[d]vt.&vi.加,加入;增加,添加
increase[in'kri:s]vt.&vi.n.增加,增大,增多
wood[wud]n.木,木头,木材,木料,木柴树林
fire['fai]n.火,射击,热情vt.〈口〉解雇
四加五等于九
addto增加,加强
这小女孩不太善于做加法。addition['din]n.加;加法
clever['klev]adj.聪明的,机灵的/灵巧的,精巧的
inadditiontoadv.除…之外
general['denrl]adj.一般的
introduction[,intr'dkn]n.介绍;引言;引进,采用
course[k:s]n.课程/进程,过程/一道菜
provide[pr'vaid]vt.&vi.提供;供给;供应
practical['prktikl]adj.实践的实用的/注重实际的;有实际工作能力的
experience[iks'pirins]n.经验,体验/经历;阅历/体会
practicalexperience实际经验
课程除了一般介绍电脑知识外，还提供实际操作的机会。
有封写给你收的信。（挂号信）letter['let]n.信,函件/字母
address['dres]n.演说,演讲住址,地址
32.Headdressedtheaudienceinaneloquentspeech.他向听众发表了雄辩的演说。address['dres]vt.向…讲话,向…发表演说
audience[':djns]n.观众,听众;读者
eloquent['elkwnt]adj.雄辩的,有口才的
Admire[d'mai]vt.赞赏;钦佩
persistence[p'sistns]n.坚持不懈
你可以不喜欢他，但你不得不佩服他那种坚韧不拔的精神。
admit[d'mit]vt.&vi.承认,供认我必须承认，这比我想象的要困难得多。
admitto允许(某人)进入…通向
admit[d'mit]vt.&vi.许可进入
sufferfrom患(某种病)/受(某种病痛)折磨
sufferingfromburns.由于烧伤
suffer['sf]vi.受痛苦;变差vt.忍受,允许/遭受
burn[b:n]n.烧伤,烧痕
burns[b:nz]n.〈美〉络腮胡子他由于烧伤，被送入医院治疗。（被许可进入医院）
36.ThedateofthemeetinghasbeenadvancedfromFridaytoMonday.
Thedateofthemeeting会议日期
hasbeenadvanced被提前到
advance[d'va:ns]vt.提前
advanced[d'va:nst]adj.超前的,先进的/高级的
Friday['fraidi]n.星期五
Monday['mndi]n.星期一会议日期已经从星期五提前到星期一。
advance[d'vɑ:ns]n.进步
inthelasttenyears.在过去十年里
(lastyear:去年)在过去十年里，医学取得了巨大的进步。show[u]n.表演,演出;展览会
advancebookingn.预订
advance[d'vɑ:ns]adj.预先的
essential[i'senl]adj.必不可少的这是个很受欢迎的演出，所以一定要提前订票。haveanadvantageover:胜过,优于
advantage[d'vɑ:ntid]n.有利条件(因素),优势/益处,利益
earthenware[':θn,we]n.陶器
earthen[':θn]adj.(地面或墙)泥土做的;土制的/(物体)陶制的
ware[w]n.商品,小货品/制品easily['i:zli:]adv.容易地,不费力地
clean[kli:n]adj.清洁的,纯净的
inbeingadj.现有的陶器的优点在于比木器更容易保持清洁。
richexperience：丰富的经验rich[rit]adj.富裕的
advantage[d'vɑ:ntid]n.有利条件,有利因素,优势
applicant['pliknt]n.申请人,求职人
over['uv]prep.(表示等级或数目)高于;在…之上,超过
gave[ɡeiv]give的过去式她丰富的经验使她比其他求职者具有有利条件。
我征求这位老师的意见ask[ɑ:sk]vt.&vi.问,询问；要求,请求vt.邀请
advice[d'vais]n.劝告,意见/消息,报道;(商业)通知
42.Ifyoutakemyadviceyouwon'ttellanyoneaboutthis.takeadvice征求意见,请教
tellabout告诉(某人)有关…的情况;谈及
你要是听我劝告的话，最好别向任何人透露此事
他向我提了一些很好的意见。advice[d'vais]n.劝告,忠告,意见;消息,报道
部长忙于重要国务。minister['minist]n.大臣,部长;公使,外交使节;牧师state[steit]n.状态/国家,政府vt.陈述/规定,指定bebusywith忙于
别管闲事！affair['f]n.发生的事情;大事;事件事务,事态own[un]adj.属于自己的vt.拥有;承认
她害怕这狗会咬人。dogbite犬咬伤;狗咬伤
bite[bait]vt.&vi.咬,叮n.咬(伤),叮伤afraid['freid]adj.害怕的,恐惧的/担忧,忧虑
对他来说，非洲是一片神秘的土地。mysterious[mi'stiris]adj.神秘的Africa['frik]n.非洲
48.Weshallarrivesoonafter.我们将随后很快就到达。soonafter不久之后,稍后
史密斯先生吃过早餐后就动身去伦敦了。for[f:,f]prep.(表示方向)向,朝,开往leavefor出发去(某地)
你离开房子之后，我发现了你的外衣。after['ɑ:ft]conj.在…以后
found[faund]vt.创办,成立;建立(find的过去式)
在以后的几年里，他变得衰弱了。grew[ɡru:]grow的过去式
grow[ɡru]vt.种植vi.生长,发育vi.&linkv.渐渐变得weak[wi:k]adj.弱的;无力气的;淡的;稀释的
请再说一次。
我们逆风航行。againstthewind顶风逆风
wind[wind]n.风,气流;呼吸vt.缠(卷)绕;给…上发条sail[seil]n.帆vi.起航,开船航行
有26票赞成他，8票反对他。vote[vut]vt.&vi.投票,表决n.选票against['ɡenst]prep.(表示态度)反对votefor投票赞成/建议
我们存了一些钱，以备老年之用。against['ɡenst]prep.(表示目的)为…做准备,防备…之用
你多大年纪？age[eid]n.年龄/时代,时期vt.&vi.(使)长大,变老
period['pirid]n.时期,时代/学时,课时/句号learn[l:n]vt.&vi.学习;学;学会/得知;获悉;听说learnt[l:nt]learn的过去式和过去分词
Iron['ain]n.铁、熨斗、镣铐/坚强,冷酷vt.&vi.熨平IronAge['ain]n.铁器时代
人类学会用铁制造工具的时代称为铁器时代
我好久没见到你了。forages很长时间
忧虑催人老anxiety[n'zaiti]n.焦虑,不安/渴望,热望age[eid]vt.&vi.(使)长大,变老
他两年前来到这里ago['ɡu]adv.以前
reasonable['ri:znbl]adj.通情达理的,合理的;公道的proposal[pr'puzl]n.提议;建议/求婚rationalizationproposal合理化建议
rationalization[,rnlai'zein]n.合理化我觉得这是个合理的建议，但他不同意。
我们同意立即离开。agreeto同意,赞成,同意照办atonce立刻
几个证人的陈述并不一致。Witne['witnis]n.目击者;证人/证词;证据statement['steitmnt]n.声明,陈述/结算单,报表agreewith与…相符,与…一致
dictionary['diknri]n.词典,字典
invaluable[in'vljubl]adj.无法估计的,aid[eid]vt.n.帮助,援助/助手,辅助手段
aninvaluableaid:非常有用的工具在学习一种新语言时，词典是非常有用的工具。
Aid[eid]vt.n.帮助,援助aided['eidid]adj.半自动的
investigation[in,vesti'gein]n.(正式的)调查,侦查bythecooperationofthepolice得到警方的大力协助cooperation[ku,p'rein]n.合作
greatly['greitli]adv.大大地,非常
你的生活目标是什么？aim[eim]n.瞄准/目标,目的inlife一生中,世间,活着的
我瞄准目标射击，但却打在墙上aimat(以…)瞄准;针对,以…为目标/计划,打算
aim[eim]vt.&vi.(以…)瞄准;针对vi.以…为目标[目的]target['tɑ:git]n.(射击的)靶子hit[hit]vt.&vi.打,打击、碰撞
他的目标是成为一个成功的作家。aim[eim]vi.以…为目标[目的]
successful[sk'sesful]adj.成功的;如愿以偿的writer['rait]n.作者,作家
早晨的新鲜空气使他觉得愉快。fresh[fre]adj.新鲜的/(水)淡的,无盐味的
这个周末我将要乘飞机去纽约旅行。travelto朝…方向旅行
72.Therewasanairofexcitementatthemeeting.开会时气氛显得有些兴奋。air[]n.气氛vt.使房间通风,透气
excitement[ik'saitmnt]n.兴奋,激动/令人兴奋的事
radiation[,reidi'ein]n.放射(物)
leak[li:k]vt.&vi.漏vt.使泄露n.漏洞,裂缝泄漏cause[k:z]vt.成为…的原因;导致/引起,促使,使发生widespread['waidspred]adj.分布广的;普遍的,广泛的spread[spred]vt.&vi.伸开,展开/(使)传播散布n.传播,蔓延
alarm['lɑ:m]n.警钟,警报（器）泄露的消息引起了公众的普遍恐慌。
我一看见冒烟，就发出了警报。givethealarm发警报assoonas一…就…
alike['laik]adj.相像的adv.同样地
character['krikt]n.品质,特性,特色,角色
alive['laiv]adj.有活力的,活跃的
alive['laiv]adj.在世的
79.Hespentallhistimereading.spend[spend]vt.&vi.用钱,花钱vt.度过;用尽
dull[dl]adj.迟钝的,呆笨的/枯燥无味的，不锋利的
noplayn.不休息
allalong：自始至终
82.Allenjoyedthemselves.
allow['lau]vt.允许,许可(做某事)
84.Shesaidalmostnothing.almostnothing几乎没有
alone['lun]adj.单独的
这两兄弟非常相像。我们的性格很相似当他到达时，城里非常热闹你的祖父母还在世吗？他把全部时间都花在阅读上（谚）只工作不玩耍，聪明杰克也变傻。自始至终，那件事我都知道。每个人都玩得很尽兴。这里不许吸烟。她几乎什么都没说。我独自在教室里。
你不能仅靠面包维生。liveon:以…为食;靠…为生/住在…上bread[bred]n.面包/生计alone['lun]adv.单独地,独自地
我们沿着路走。along['l]prep.沿着,循着,顺着
我们骑着脚踏车前进，大声歌唱着along['l]adv.向前,往前
当我到达时，你已经走了。
我曾到过那，不想再去了。
汤姆曾去过日本，我也曾去过。havebeentov.曾经到过
although[:l'u]conj.尽管,虽然/但是,然而
strongandhealthy强健我的叔叔虽然老了，但他看上去还是很健壮。
晚上我总是在家里
94.Weshouldalwayshelpeachother.我们应始终互相帮助
专业英语重点句子(带单词翻译版)
Unit1(5个)
1.Materialsscienceandengineering(MSE)isaninterdisciplinaryfieldconcernedwithinventingnewmaterialsandimprovingpreviouslyknownmaterialsbydevelopingadeeperunderstandingofthemicrostructure-composition-synthesis-processingrelationships.
2.Materialsscientistsandengineersnotonlydealwiththedevelopmentofmaterials,butalsowiththesynthesisandprocessingofmaterialsandmanufacturingprocessesrelatedtotheproductionofcomponents.
3.Oneofthemostimportantfunctionsofmaterialsscientistsandengineersistoestablishtherelationshipsbetweenamaterialoradevice’spropertiesandperformanceandthemicrostructureofthatmaterial,itscomposition,andthewaythematerialorthedevicewassynthesizedandprocessed.
4.Inmaterialsscience,theemphasisisontheunderlyingrelationshipsbetweenthesynthesisandprocessing,structure,andpropertiesofmaterials.
5.Inmaterialsengineering,thefocusisonhowtotranslateortransformmaterialsintoausefuldeviceorstructure.
Unit2（3个）
6.WhatisalsofascinatingaboutvanderWaalsforcesisthattheybeginasinteractionsbetweenatomsandmoleculesthatultimatelyleadtoconsiderableforcesbetweenfineparticlesofanymaterial.
7.Wemakeuseofmetalandceramicpowders(dryorslurries)inprocessingmanyceramicandmetallicmaterialsthroughroutescollectivelyknownaspowderprocessing(Processingtechniqueformetalsinvolvingthesolid-statebondingofafinegrainedpowderintoafullydenseproduct).
8.Wecanaccomplishthisbyintroducinglikechargesontheparticles(electrostaticstabilization)oradsorbingsoaplikesurfactantmoleculesonthesurfacesofparticles(stericstabilization).
Unit3（8个）
9.TheSi-ObondintheSiO44-structureinabout50percentcovalentand50percentionicaccordingtocalculationsfromPauling’sequation.
10.ThetetrahedralcoordinationofSiO44-satisfiesthedirectionalityrequirementofcovalentbondingandtheradiusratiorequirementofionicbonding.
11.IftwocornersofeachSiO44-tetrahedronarebondedwiththecornersofothertetrahedra,achainorringstructurewiththeunitchemicalformulaofSiO32-results.
12.Silicatesheetstructureformwhenthreecornersinthesameplaneofasilicatetetrahedronarebondedtothecornersofthreesilicatetetrahedra.
13.Themineral['mnrl](矿物的,矿物)kaolinite['kelnat](高岭石)consists(initspureform)ofeverysmall,flatplatesroughlyhexagonal[hek'sɡnl](六边的，六角形的)inshape,withtheiraveragesizebeingabout0.7umindiameter[da'mt](直径)and0.05umthick.
14.Anotherexampleofasheetsilicateisthemineraltalc[tlk](滑石；云母),inwhichasheetofMg3(OH)24+bondswithtwoouter-layerSi2O52-sheets(oneoneachside)toformacomposite['kmpzt](复合的；合成的)sheetwiththeunitchemicalformula['fmjl](公式,方程式)Mg3(OH)2(Si2O5)2.
15.Crystalline['krst()lan](结晶的)silicaexistsinseveralpolymorphic[,pl'mfk](多态的)formsthatcorrespondtodifferentwaysinwhichthesilicatetetrahedralarearrangedwithallcornersshared.
16.Themoststableformsofsilicaandthetemperaturerangesinwhichtheyexistatatmosphericpressurearelowquartz[kwts](石英)below573℃,highquartzbetween573to867℃,hightridymite['trdmat](鳞石英)between867and1470℃,andhighcristobite[kris'tu,blait](方石英)between1470and1710℃.
Unit4（15个）
17.Pointdefects(点缺陷)arelocalized['lok'lazd](局部的；地区的；小范围的)disruptions[ds'rpn](破坏)inotherwiseperfectatomicorionicarrangementsinacrystalstructure.
18.Theseimperfections,maybeintroducedbymovementoftheatomsorionswhentheygainenergybyheating,duringprocessingofthematerial,byintroductionofimpurities,ordoping[dop](掺杂).
19.Animportant"point"aboutpointdefectsisthatalthoughthedefectoccursatoneortwosites,theirpresenceis"felt"overmuchlargerdistancesinthecrystallinematerial.
20.Whenatomsorionsaremissing(i.e.,whenvacanciesarepresent),theoverallrandomness['rndmns](随意；无安排；不可测性)orentropy['entrp](熵)ofthematerialincreases,whichincreasesthethermodynamic[,θmda'nmk](热力学的)stabilityofacrystallinematerial.
21.Vacancies['veknsi](空位)playanimportantroleindeterminingtherateatwhichatomsorionscanmovearound,ordiffuse[d'fjuz](弥散,扩散)inasolidmaterial,especiallyinpuremetals.
22.Ifweconduct(管理；引导；表现)thissintering['sntr](烧结)treatmentinareducingorinertatmosphere(e.g.,hydrogenornitrogen),someoftheoxygenionsfromBaTiOawillleavethematerialintheformofoxygengas.
23.Insomecases,wecanintroducevacanciesatspecificionsitessoastoenhancethemovementofionsinceramicmaterials,whichcanhelpsinterceramics[n'hɑns](提高；加强；增加)atlowertemperatures.
24.Atroomtemperature(~298K),theconcentration[kns()n'tre()n](集中,浓度)ofvacanciesissmall,buttheconcentrationofvacanciesincreasesexponentially[,kspo'nnli](以指数方式)asweincreasethetemperature,asshownbythefollowingArrheniustypebehavior:
http://www.oh100.com erstitial[,nt'st()l](间质的；空隙的；填隙的)atomsorions，althoughmuchsmallerthantheatomsorionslocatedatthelattice['lts](晶格；格子)points，arestilllargerthantheinterstitialsitesthattheyoccupy;consequently,thesurroundingcrystalregion['rid()n](范围)iscompressedanddistorted[ds'trtd](扭曲).
http://www.oh100.com erstitialatomssuchashydrogen['hadrd()n](氢)areoftenpresentasimpurities;whereas[wer'z](然而；鉴于；反之)carbonatomsareintentionallyaddedtoirontoproducesteel.
27.Iftherearedislocations(变位；位移；断错)inthecrystalstryingtomovearoundthesetypesofdefects,theyfacearesistancetotheirmotion,makingitdifficulttocreatepermanentdeformation(永久性变形)inmetalsandalloys.
28.Substitutional[,sbst'tjnl](置换)atomsorionsmayeitherbelargerthanthenormalatomsorionsinthecrystalstructure,inwhichcasethesurroundinginter-atomicspacingsarereduced,orsmallercausingthesurroundingatomstohavelargerinter-atomicspacings.
29.Whetheratomsorionsaddedgointointerstitialorsubstitutionalsitesdependsuponthesizeandvalenceofguestatomsorionscomparedtothesizeandvalenceofhostions.
Unit5（10个）
30.Semiconductors(半导体)whichdonotcontainappreciable['prib()l](可感知的；可评估的；相当可观的)levelsofdopantsorimpuritiesareknownasintrinsic[n'trnsk](本质的，固有的)semiconductors,WhenweaddsmallconcentrationsofPorBtosiliconcrystal,theseatomsoccupycrystallographic[,krstlɑ'ɡrfk](结晶的)siteswheresiliconatomsusuallyreside(住，居住；属于).
31.TheresultiseachPatomaddedhasone"extra"electronthatcannotpairwithaSiatomtoformafifthSi-Pbond.
32.Theentiremicroelectronics[,makrlek'trnks]微电子学)industry,asweknowittoday,wouldnotexistifwedidnothaveagoodunderstandingofthediffusionofdifferentatomsintosiliconorothersemiconductors.
33.Strongcovalent[,ko'velnt](共价的)andionicbondsalongwithmicrostructuralfeaturescontributetotherelativelypoorelectricalconductivityexhibited[g'zbt]bymanyceramics.
34.Theabilityofionstodiffuseandprovideapathwayforelectricalconductionplaysanimportantroleinenablingtheseapplications.
35.Thisisoneofthemajorreasonswhyweusepolyethyleneterephthalate(PET聚对苯二甲酸乙二醇酯)tomakebottleswhichensurethatthecarbonatedbeverages['bev()rd](饮料)theycontainwillnotloosetheirfizz(兴奋，活力；嘶嘶声；充气饮料)forareasonableperiodoftime.
36.Inreality,aluminum['ljumnm]oxidizes['ksdaz](氧化)(rusts)moreeasilythaniron.However,thealuminumoxide(Al2O3)formsaveryprotectivebutthincoatingonthealuminum’ssurfacepreventinganyfurtherdiffusionofoxygenandhindering(妨碍)furtheroxidationoftheunderlyingaluminum.
37.Wedistinguish[d'stgw](区分)betweenthemovementofatoms,molecules['mɑl,kjl],ions,electrons,holes,etc.asaresultofconcentrationgradient['grednt](梯度)andtemperature(diffusion)orsomeotherdrivingforce,suchasgradientsindensity['denst](密度),electricfield,ormagneticfieldgradients.
38.Thisequation来自，源自于)astatisticalanalysis(统计分析)oftheprobabilitythattheatomswillhavetheextraenergyQneededtocausemovement.
39.Thedisordervacanciescreate(i.e.,increasedentropy)helpsminimizethefreeenergyand,therefore,enhancethethermodynamicstabilityofacrystallinematerial.
40.Inchapter3,wehaveseenthatformanyceramicswithionicbondingthestructure密集流水)ofanions(阴离子)withcations(阳离子；正离子)intheinterstitialsites.
41.Athighertemperatures,thethermal['θm()l](热的)energysuppliedtothediffusingatomspermitstheatoms活化能)barrierandmoreeasilymovetonewsitesintheatomicarrangements.
Unit6（9个）
42.Sincemelting,casting,andthermomechanical[,θ:mumi'knikl](热]热机的，[热]热机械的)processingisnotaviable['vabl](可行的；能养活的；能生育的)optionforpolycrystalline[,pɑl'krst'lan](多晶)ceramics,wetypicallyproceceramicsinto
usefulshapesstartingwithceramicpowders.
http://www.oh100.com hisprocess,thegreenceramicisheatedtoahightemperature,usingacontrolledheatandatmosphere,sothatadensematerialisobtained.
44.Powdersconsistofparticlesthatarelooselybonded,andpowderprocessinginvolvestheconsolidation[kn,sl'den](巩固；合并；团结)ofthesepowdersintoadesiredshape.
45.Insomecases,verylargepieces(uptoafewfeetindiameterandsixtoeightfeetlong)canbeproducedusingaprocecalledcoldisostaticpressing(CIP冷等静压制)wherepressureisappliedusingoil.
46.Similarly,largepiecesofmetalsandalloyscompacted['kmpktid](.压实的；压紧的)usingCIPcanbesinteredunderpressureinaproceknownashotisostaticpressing(HIP热等静压；高温等静力压制).
47.Somerecentinnovative['nvetv](革新的，创新的)processesthatmakeuseofmicrowaves(similartothewayfoodgetsheatedinmicrowaveoven)havealsobeendevelopedforthedryingandsinteringofceramicmaterials.
48.Someceramics,suchassiliconnitride['natrad](氮化物)(Si3N4),areproducedbyreactionbonding(反应粘合).
49.Reactionbonding,whichcanbedoneatlowertemperatures,providesbetterdimensional[d'mennl](空间的,尺寸的)controlcomparedwithhotpressing;however,lowerdensitiesandmechanicalpropertiesareobtained.
50.Thismixturehasaclay(粘土)-lakeconsistency[kn'sst()ns](一致性；稠度；相容性),whichisthenfedtoanextruder[k'strud](挤出机；挤压机)whereitismixedwellinasheared[d](修剪),deaerated[di'ret](出去空气),andtheninjected(注入的)intoadie(冲模，钢模；骰子)whereacontinuousshapeofgreenceramicisproducedbytheextruder.
Unit7（2个）
51.Thecombinationoftransparency[trn'spr()ns](透明，透明度)andhardneatroomtemperaturealongwithsufficient(足够的；充分的)strengthandexcellentcorrosion
[k'r()n](腐蚀)resistancetomostnormalenvironmentsmakeglassesindispensableformanyengineeringapplicationssuchasconstructionandvehicleglazing(上釉；玻璃装配业).
52.However,inborosilicate[,br'slket]glasses(硼硅酸盐玻璃)thathaveadditionsofalkali['lkla](碱；可溶性无机盐)and碱土金属)oxides,BO33-trianglescanbeconverted(转化)toBO44-tetrahedra,withthealkalioralkalineearthcationsprovidingthenecessaryelectroneutrality.
Unit8（14个）
53.Itreactsrelativelyquicklywithwater,andinnormalPortlandcements(波特兰水泥，硅酸盐水泥，普通水泥)isthemostimportantoftheconstituent[kn'sttjnt](成分；选民；委托人)phasesforstrengthdevelopment;atagesupto28days,itisbyfarthemostimportant.
54.Therateatwhichitreactswithwaterappearstobesomewhatvariable,perhapsduetodifferencesincompositionorothercharacteristics,butingeneralishighinitially['n()l](起初的)andloworverylowatlaterages.
标准技术规范；标准规格)withwhichsuchcements(水泥；胶合剂)mustcomply[km'pla](遵守)aresimilar,butnotidentical[a'dentk()l](同一的；完全相同的),inallcountriesandvariousnamesareusedtodefinethematerials,suchasCla42.5PortlandcementincurrentEuropeanandBritishstandards(42.5istheminimum28-dayscompressivestrengthinMPa),TypeIandIIPortlandcementintheASTM(AmericanSocietyforTestingandMaterials)specificationsusedinUSA,orOrdinaryPortlandCement(OPC)informerBritishstandards.
56.Standardspecificationsare,ingeneral,basedpartlyonchemicalcompositionorphysicalpropertiessuchasspecificsurfacearea,andpartlyonperformancetests,such
57.ThecontentofMgOisusuallylimitedto4%--5%,becausequantitiesofthiscomponentinexceofabout2%canoccuraspericlase(magnesiumoxide),whichthroughslowreactionwithwatercancausedestructiveexpansionofhardenedconcrete['kkrit](具体物；凝结物).
58.Manyotherminor['man](次要的,未成年的)componentsarelimitedincontentbytheireffectsonthemanufacturingprocess,ortheproperties,orboth,andinsomecasesthelimitsaredefinedinspecifications.
59.Rapid-hardeningPortlandcementshavebeenproducedinvariousways,suchasvaryingthecompositiontoincreasethealite['eilait](硅酸三钙石；A-水泥石)content,finergrinding['ɡrand](磨的)oftheclinker['klk](渣块；炼砖),andimprovementsinthemanufacturingprocess,e.g.,finergrindingorbettermixingoftherawmaterials.
60.ThealitecontentsofPortlandcementshaveincreasedsteadilyovertheoneandahalfcenturiesduringwhichthelatterhavebeenproduced,andmanycementsthatwouldbeconsideredordinarytodaywouldhavebeendescribedasrapidhardeningonlyafewdecadesago.
61.Forbothordinaryandrapid-hardeningcements,bothlowerandupperlimitsmay利用；欺骗；施加影响于againstpoordurability[,djr'blti](耐久性；坚固；耐用年限)resultingfromtheuseof
inadequate[n'dkwt](不充分的，不适当的)cementcontentsinconcrete.
http://www.oh100.com structiveexpansionfromreactionwithsulfates['slfet](硫酸盐)canoccurnotonlyifthelatterarepresentinexcessive[k'sesv](过多的，极度的)proportion(比例)inthecement,butalsofromattackonconcretebysulfatesolutions.
63.ThereactioninvolvestheAl2O3-containgingphasesinthehardenedcement,andinsulfate-resistingPortlandcementsitseffectsarereducedbydecreasingtheproportionofthealuminatephase,sometimestozero.
64.ThereactionofPortlandcementwithwaterisexothermic[,eks()'θmk](发热的),andwhilethiscanbeadvantageundersomeconditionsbecauseitaccelerateshardening,itisadisadvantageunderothers,suchasintheconstructionoflargedamsorintheliningofoilwells,水泥渣)hastobepumpedoveralargedistanceunderpressureandsometimesatahightemperature.
65.lowerheatevolution[,iv'lu()n](演变；进化论；进展)canbeachievedbycoarse
[ks](粗糙的)grinding,anddecreasedtotalheatevolutionbyloweringthecontentsofaliteandaluminate.
66.TheASTMspecificationsincludedefinitionsofaTypeIIor“moderateheatofhardening”cement,andamoreextremeTypeIVor“lowheat”cement.
Unit9（无）
Unit10（7个）
http://www.oh100.com posites(复合材料)arecombinationsoftwomaterialsinwhichoneofthematerials,calledthereinforcing[,rin'frs](增强的)phase,isintheformoffibers(纤维),sheets,orparticlesandisembedded[m'bed](栽种,嵌入)intheothermaterial,calledthematrix['metrks](基质)phase.
68.Ifthecompositeisdesignedandfabricated['fbr,ket](制造，组装)correctly,itcombinesthestrengthofthereinforcementwiththetoughness(韧性；强健；有粘性)ofthematrixtoachieveacombinationofdesirablepropertiesnotavailableinanysingleconventionalmaterial.
69.Becauseofthevarietyofavailablereinforcementandmatrixmaterials,aswellastheabilitytocombinetheminawiderangeof(体积分量),compositescanbeproducedwithabroadrangeofproperties,notably['notbli](显著的)['lstk]['mdjls]弹性系数；弹性模数),strength,andtoughnecombinations.
70.Acompositeisacombinationofareinforcingphasepresentintheformofparticles,whiskers,orfibersinamatrixthatholdsthediscrete[d'skrit](.离散的，不连续的)reinforcementpiecestogetherandprovidesthemwithlateralsupport.
71.Manycompositesoccurnaturally。
72.Examplesincludewood,whichessentially(本质上；本来)consistsof纤维素纤维)inamatrixofhemicellulose[hem'seljlz](半纤维素)andlignin['lgnn](木质素);andbones,whicharecompositesofsoftprotein['prtin](蛋白质)collagen['kld()n](胶原质)andhardmineralscalledapatites['ptat](磷灰石).
http://www.oh100.com positematerialshavebeendevelopedinresponsetotheneedforman-madematerialswithunusualcombinationsofpropertiessuchashighspecificstrength(i.e.,highstrength-to-densityratio)andstiffness['stfns](僵硬；坚硬)inonedirection,oracombinationofhighstrengthandtoughnenotavailablefromanysinglematerial.
PEP新版英语三年级上册1-3单元单词句子大全
1、写出下面单词的汉语，并大声读单词三遍。签字
penpencilpencilboxrulererasercrayonbookbagredyellowgreenbluewhiteblackorangebrownschoolheadfacenosemoutheyeeararmhandlegfootbody2写出下面句子的汉语，并大声读句子三遍
Hello,I’mWuYifan.Hi,I’mSarah.Ihavearuler.Ihaveaeraser.Metoo.What’syourname?Myname’sJohn.Goodbye!Bye!Seeyou.MrJones,thisisMissGreen.Goodmorning,MissGreen.Goodmorning.Goodafternoon,WuYifan.Goodafternoon.Iseered.Metoo.Nicetomeetyou.Nicetomeetyou, http://www.oh100.com louritbrown!OK!Howareyou?I’mfine,thankyou.Verywell,thanks.Let’sgotoschool!OK!Lookatme.Let’smakeapuppet!Great!Goodidea！Thisismyface.
在四线格中写出26个字母的大小笔顺一遍，再把字母写一遍，正读三遍。倒读三遍。