大學科技英語課文例句和課后部分答案

把光射束射向地球Laserareemittedat這模型描述了原子的情況Thismodelisdescriptivethebehavior那教授將做有關移動通訊方面的講座Thatprofessorwilldeliveralectureonmobilecommunication她本科生上C++程序設計語言課ShegivesundergraduateslessonsintheC++programminglanguage這學生在做物理實驗studentsanexperimentinphysics他在做電學實驗Theyareanexperimentelectricity該授對沃氏函數(shù)的研究起了重要作用TheprofessorhasplayedanimportantroleintheresearchontheFunctions無電波朝四面八方傳播travelindirections為，我們必須在負載兩端接一個電容器Forthispurpose,wemustconnectacapacitoracrosstheload10.在這個溫度上該金屬就會化Atthistemperaturethemetaiwillmelt11.該專家將在會議上宣讀一重要的學術論文Theexpertwillreadanimportantacademicpaperatconference12.速度等于距離與時間之比Speedratioofdistancetotime13.太陽離地球的距離是很遠Thedistanceoffromtheearthisgreat14.溫度對金屬導電率的影響很小的effectoftemperatureonconductivityofmetalssmall15.本節(jié)論述晶體管與電子管比的優(yōu)點Thissectiondealswiththeadvantagesoftransistorsoverelectrontubes16.重力加速度隨緯度的變化部分原因是由于地球的自轉(zhuǎn)Thevariationofgwithlatitudeisdueinpartthe’rotation17.Y對x的從關系用表示Thedependenceofyonxisexpressedbyy=f(x)18.人們用橢圓來描述行星繞陽的運行情況aretodescribeofplanetsthe我討論了電流通過酸堿鹽溶液的情況Wehavediscussedthepassageofanelectriccurrentthroughliquidsolutionsofacids,bases,andsalts20.物體對凈力F的影響就是比于F的加速度aTheresponseofaanetforceisanaccelerationaproportional21.把式（）式6相比較，我們就能的得到一下幾個關系式AcomparisonofEq.(4)withEq.(6)Leadstofollowingrelations22.我們可以把一個力分解成x和y分Theresolutionforceandycomponentsispossible23.應避免使人體接觸有潛在性的物質(zhì)Exposureofthebodytopotentiallytoxicsubstancesshouldbeavoided24.這些特殊問題是有把原子用作為能源而產(chǎn)生的Thesespecialarisetheofatomicenergyassourceofpower25.把電流定義為電荷的運動我們大家都是熟悉的Thedefinitionofanelectriccurrentastheflowelectricchargeisfamiliarallus26.哥倫布發(fā)現(xiàn)美洲是在哪一WhatdateofthediscoveryofAmericabyColumbus愛斯坦確立了相對論是20世最重要的事件之一Theformationofthetheoryof

relativityEinsteinoneofthemostsignificanteventsofcentury28.門捷列夫于1869年現(xiàn)了周期表使人們有計算原子質(zhì)量的另一種方法Tdiscoverytheperiodicbysuggestedanotherwayofestimatingatomicmasses29.這個工廠和那個一樣大Thefactoryislargeasthatone30.銅的導電能力幾乎和銀一好Copperconductselectricityalmostaswellassilver31.這臺計算機的體積是一臺印機的倍sizeofthiscomputeristimesaslargethattypewriter32.那根導線長達100米wireisaslongas33.這根導線不如那根長Thiswireislongasthatone(is)34.這臺計算機的性能不如那好Thiscomputerdosenotasthat35.導線越長，電阻越大Thelongerthe,thegreatertheresistance36.電壓越大，電流就越大Thegreaterthevoltage,thelargercurrent電越大，在導線中產(chǎn)生的熱量就越多Thelargerthecurrent,theheatwillbeproducedin38.你學習越努力，你的進步會越大Theharderyoustudy,thegreaterprogresswillmake39.在無線電接收機中，一部功率轉(zhuǎn)變成了聲波Inaradioreceiver,somepowerisconvertedtowaves40.絕緣體可以被用在導體之來防止電流在他們之間流動Insulatorsmaybeusedbetweenconductorsinorderpreventtheflowofelectriccurrentbetweenthem41.把理論應用于實踐是非常要的Toapplytheorytopracticeveryimportant42.制作這樣的電感器需要許這樣的線匝和鐵芯Toconstructsuchinductorsrequiresturnsofwireiron43.現(xiàn)在能夠把太陽光直接轉(zhuǎn)成電Itisnowpossibletoconvertsunlightdirectlyintoelectricity44.我們似乎能求出這個電流Itseemspossibletooutthiscurrent45.操作這臺機器并不是件容的事Itisanjoboperatethis46.做實驗是極為重要的Itgreatimportancemakeexperiments47.解這個方程將要花費我們多時間Itwillusalotoftimetosolveequation48.們發(fā)現(xiàn)用弧度而不是用度數(shù)表示角度是比較便的Itisfoundconvenienttoexpressanglesradiansratherthandegrees49.當電流流過電路時損掉一部分能量Flowingthroughacircuit,thecurrentwilllosepartofitsenergy50.若已知電流和電阻們能求出電壓Givencurrentresistance,wefindoutvoltage51.由于具有大量的自由電子，所以它是良導體Havingalargenumberoffreeelectrons,copperisagoodconductor52.用公式表示的話，電路中的電壓，電流，電之間的關系可寫成V=IRExpressedinaformula,therelationshipbetweenvoltage,currentandresistanceinacircuitcanbewrittenasV=IR53.由銅是電良導體，所以被廣泛的用在電工技術中

Beingagoodconductorofelectricity,copperwidelyinelectricalengineering54.銀是最好的導體，其次是Silverbestconductor,followedbycopper55.Σ是希臘字格瑪思之letter“of”56.當機車拉著火車跑時，它會做功locomotivedoeswhilepullingamovingtrain57.物體置于水中，就會感覺到他比較輕placedinwater,everythingwillbefound

lighter58.這一設備，如果設計得當就可以用無線電控制

Thisdevice,properlydesigned,canbecontrolledbyradio59.當把雷達信號發(fā)向月球時于月球是固體所以能反射信號Whenradarsignalssenttothemoon,themoon,beingsolid,reflectsthem60.若該電流發(fā)生變化，磁場將變化Thiscurrentchanging,themagneticfieldwillchangeaswell若他情況相同，電阻將正比于導體的長度Otherthingsbeingequal,theresistancedirectlyproportionalthelengthofconductor62.當陽光照在光電電池上時，該設備就會自動工作起來Thesunlightfallinguponphoto-electriccells,thedevicewillautomaticallyintooperation63.由于原子很小，所以我們不見它們Atomsbeingextremelysmall,wecannotthem64.幾乎所有的金屬都是良導為最好Almostallmetalsconductors,silverbeingthebest65.當導體內(nèi)的電流發(fā)生變化時就會在到體內(nèi)感出一個電動勢，因而這種電動勢就成為自感電動勢thereischangeofcurrentinaconductor,aninducedintheconductor,thusthiskindofemfbeingcalledaself-induced66.銀在金屬中電阻率最低，銅的電阻率比他高不了很多Silverhassmallestresistivityofanymetal,withthatofcoppernotmuchgreater67.若電路中沒有電阻，電流會無限增大resistancethecircuit,thecurrentincreaseforever68.我們周圍的一切東西均是質(zhì)這一事實是大家都知道的ThefactthateverythingusmatterisknowntoallP（）69.在這種情況下，該函數(shù)必存在這一條件并沒有滿足thiscase,theconditionthatthefunctionexistisnotsatisfied70.等式只是某個量等于另一量的一種陳述Anequationsimplyastatementthatacertainquantityequalanotherone71.歐姆觀察到這一事實電壓保持不變阻越大就越小observedfactthatthevoltageremainsthegreaterresistance,thesmallercurrent72.質(zhì)子和電子之間所觀察到作用力，就導致了大家所熟悉的說;同電荷相互排斥，一中電荷相互吸引Theobservedforcesprotonsandelectronsthenleadtothefamiliarstatementthatlikechargesrepeloneanother,unlikechargesattractoneanother這實驗用來證實吉爾伯特的結(jié)論：電荷有兩種ThereexperimentsservetoconfirmGilbert'sconclusionthattherearetwokindsofelectriccharge74.子學的誕生，是從發(fā)現(xiàn)了真空二極管中的電，可以通過引入第三個電極來加以控制這個時候算起的Theadventofelectronicsisreckonedfromthediscoverythecurrentinavacuumdiodecancontrolledbyintroducingathirdelectrode75.十九世紀科學上最顯著的就之一是人們認識到了光是由電磁波構成的themostnoteworthyachievementsof19thcenturysciencetherealizationthatlightconsistofelectromagnetic76.在人們越來越認識到這些技術在諸如控制系和儀表測量這樣的領域中也是很有價值的Theregrowingawarenessthatthesetechniquesarealsoofvalueinsuchareasassystemcontrolandinstrumentation

77.這兩個帶電球之間的斥力明具有同種電荷的物體相互排斥Therepulsionthesechargedisevidencethatbodieshavinglikechargeseachother78.由圖2可看出這一現(xiàn)象與反射有關thisphenomenonhasconnectionwithreflectionfromFig.2P（）79.每個電路的工作原理在這章進行了詳細的討論eachcircuitworksdiscussedindetailthischapter80.我們用哪個式子，將取決在題目中給出了那些數(shù)據(jù)Whichequationwewanttousewilldependondatagivena81.我們可以用計算機解決這復雜的題目ispossiblethatuseacomputersolvethesecomplicatedproblems82.有趣的是，每個函數(shù)均可一些簡單函數(shù)來近似Itisinterestingthateveryfunctioncanbeapproximatedbysimplyfunctions83.那個問題是如何解決的還個謎Itisamysteryhowtheproblemwassolved84.眾所周知我們周圍的一切西均為物質(zhì)isknownthateverythingaroundmatter在久以前人們就發(fā)現(xiàn)電流的方向與電子的方向相反Itwasfoundlongagothatthedirectionofcurrentjustoppositetoofelectronflow86.我們已經(jīng)知道接收到的信一般是很微弱的，其通常的功率約為幾皮瓦hasbeenknownthatthesignalreceivedisgenerallyquiteweak,powersoftheorderofpicowattsbeing87.尚不了解有那些因素決定種燈絲的尺寸isunderstoodwhichfactorsdeterminethesizefilamentsofkind88.我們無法預言這種現(xiàn)象何發(fā)生Itcannotbepredictedthisphenomenonwilltakeplace哪個方向運用晶管基本上是沒什么區(qū)的doesnotbasicallymakeanydifferenceindirectionanNPNtransistorisoperated90.我們知道磁場能對電流施一個力Wehaveknownthatfieldisableexertaforceonanelectriccurrent91.我們可以說物體的能量就物體做功的能力Onemaythatenergyofabodytheabilityofthatbodywork92.我們往往想要知道這一誤是否可以忽略不計Weoftenwanttowhetherthiserrorneglected93.事實是無線電波的傳播速和光速一樣Thefactisthatradiowavestravelasfastaslightdose其果將是在導線兩端之間將會存在這種電位差Theresultwillbethatthispotentialdifferencewillexistbetweenoftheconductor溫是與物體的體積無關的一種物質(zhì)性質(zhì)Temperatureisapropertythebodynotconcernedlargeis96.上面所講的就是歐姆定律hasdescribedisOhm'slaw97.我們能夠?qū)W會我們原來不的東西Wecanlearnwenotknow98.計算機能夠做人們告訴它做的事computercanwhathastoldtodo99.發(fā)電機的功能是把機械能換成電能Whatageneratorconvertmechanicalenergyintoelectricalenergy100.作在載流導線上的磁力就是使電機工作的力Themagneticforceoncurrent-carryingwiresiswhatmakeselectricmotorswork

101.我想要獲得對于A、兩之間所發(fā)生的情況的詳細描述WewishadetailedpictureofwhathappensbetweenpointsA102.所到的是同樣的那些表達式Whatresultarethesameexpressions103.這能量就是給自感電動勢供能的能量Thisenergyiswhatpowerstheself-induced104.眾周是一種電磁波Whatiswellknowthatisakindelectromagneticwave105.這是我們通常所說的力Thisiswhatwecallforce106.電計算機能懂得所謂的機器語言electroniccomputeristounderstandwhatasthelanguage107.電隨所謂的電阻變化Currentchangeswithwhatdescribedasresistance108.反回來的那部分電流形成了所謂的回波信號Thereflectedportionofwaveswhatreferredtoastheechosignal存有許多自由電子的物質(zhì)被稱為導體Thesubstanceinwhichtherearemanyfreeelectronscalledaconductor110.電流過的閉合通道被稱為電路closewhichcurrentflowsreferredastheelectriccircuit111.電機是把電能轉(zhuǎn)換成機械能的一種機器Anelectricisabyelectricenergyisintomechanicalenergy112.存電荷的器件稱為電容器Thedevicesonwhichchargesarestoredcalledcapacitors113.光播的速度是極快的Thespendatwhichlighttravelsisextremely114.用把熱能轉(zhuǎn)換成功的任何機械裝置均稱為熱機Anymechanicaldevicebymeanswhichheatconvertedintoworkiscalledaheatengine慣是物質(zhì)的一種特性，由于種特性，要使物體加速就必須對該物體施加一個力Inertiathatpropertyofforcebeexertedonabodyordertoaccelerate116.正標題所示本章論述數(shù)字計算機的原理thetitleindicates,thischapterdealswiththeprinciplesofdigital117.我知道,子是微小的負電荷Electrons,asoneknows,areminutenegativechargesofelectricity118.我已講過晶體管是電流控制器件Ashasbeendescribed,transistorsarecurrent-controldevices119.晶管體積小效率高這是大家所熟知的Transistorssmall&efficient,asiswellknownus120.顧思義流體是一種容易流動的物質(zhì)Fluid,asthenameshows,isasubstancethatflowsreadily121.一導線可用作為天線wirecanserveasanantenna122.作通訊工具，衛(wèi)星是最先進的Asameansofcommunication,asatelliteisthemostadvanced123.能被定義為物體做功的能力Energyisdefinedtheabilityofbodytodowork124.我把這個量定義為重力加速度Werefertothequantityasgravity125.一常數(shù)無論有多大不可能稱為無窮大Aconstantnumber,nomatterlargeitmaybe,isspokenofasinfinite126.把量定義為物體做功的能力是合理的Thedefinitionofasabilityofbodytodoisreasonable

127.當流流動時電池的能量就給電阻消耗了thecurrentflows,energyfromthebatterygoestoresistance128.兩體間的萬有引隨他們之間的距離的增加而減弱forceofgravitationalattractionbetweentwobodiesdecreasesasthedistancethemincreases129.由空氣有重量所以它對處于其中的任何物體均要施加一個力Asairhasweight,itexertsforceonanyobjectimmersedit130.電繞原子核旋轉(zhuǎn)，就像行星繞太陽運行一樣Electronsroundthenucleusjustastheplanetsmovesroundthe131.這計算機與那臺一樣重Thiscomputerisasheavyasthatone(is)132.原雖,是由一些更小的單元組成theyare,atomsaremadeofstillsmallerunits133.正早已證明的那樣負各項變?yōu)檎龜?shù)就發(fā)散Ifnegativetermsaremadepositivetheseriesdivergent,ashasalready134.我必須記住用以表示化學元素的那些符號Wemustremembersuchsymbolsasareusedtorepresentchemical135.我也可以用計算機解這道題Acomputerbeastosolvethisproblem我們能求出流過這個電阻的電及兩端的電壓possibletofindoutthecurrentthroughthisresistoraswellasthevoltageacrossit137.這計算機的工作性能與那臺一樣好Thiscomputerasasthat138.數(shù)是一種非常有用的工具此它廣泛用在程的各個領域之中veryusefultool.Asresult,itwidelyinvariousfieldsofengineering要外加電壓保持不變在電路中流動的電流與該電路中的電阻成反比Thecurrentflowingacircuitinverselyproportionaltheresistancethecircuitaslongastheappliedvoltageremainsconstant140.若面沒有摩擦，就不可能停止任何物體的運動Weretherenofrictiontheground,itwouldbeimpossiblestopthemotionofanybody141..電壓不那么高的話，那臺儀器也就不會被燒壞了Thatinstrumentnotdamagedhadvoltagenotbeensohigh142.如在導線中有很強的電流，那么只要用一匝大號導線就可以制成磁性很強的電磁鐵powerfulelectromagnetcanonlyturnofalarge-sizedwire,shouldaverylargecurrentthe143.若有地球的引力，地球上的一切東西都要失重Everythingontheearthwillloseitsweightprovidedtherebegravity144.若沒有半導體，就不可能有衛(wèi)星通訊這類事情Somethings,likesatellitecommunications,wouldimpossiblewithoutsemiconductors145.要是二進制計算機可能要比現(xiàn)在復雜得多forthebinarysystem,theelectroniccomputermightmuchmorecomplicated146.我本來可以用定理（）來導出式（）couldalsohaveusedTheorem(6)toderiveequation(5)147.為使電流在電路中流動保持一個電位差Itisnecessarythatpotentialdifferencemaintainedforcurrenttoflowinacircuit148.數(shù)電路設計人員必須很熟悉布爾代數(shù)的實用知識isessentialthatdigitaldesignersshouldaworkingknowledgeofalgebra149.我希望機器都不要有能量消耗Itisdesiredthathaveenergyloss

150.有建議在太空制造藥物issuggestedthatdrugsbemadespace151.我建議讀者最好用袖珍計算器來做基礎電子學中的所需的數(shù)學計算tisthatreaderuseapocketcalculatortodomathematicalworkrequiredinbasicelectronics152.經(jīng)方面要求電力以高壓傳送demandsthatelectricpowerbetransmittedathighvoltage153.實要求測量應精確Experimentsrequirethataccuratebemade154.我建議把這一點接地Oursuggestionisthispointbegrounded155.這由于輸出必須穩(wěn)定的原因Thiscomesfromnecessarythattheoutputbestable156.這傳輸線的作用就好像它是開路似的Thistransmissionlineactsasthoughitwereopen-circuit157.在種情況下金質(zhì)葉片就會散離開來好它們由通過接觸而起電的物體而帶電一樣Underthisconditiongoldleaveswilldivergejustasiftheyhadbeenchargedfromabodyelectrifiedcontact158.電差使電流在電路中流動Thepotentialdifferentcausesanelectriccurrentflowthecircuit159.正電位差使得電流在電路中流動Itthepotentialdifferencethatcausesaselectriccurrenttoflowincircuit體的慣性質(zhì)量與重力質(zhì)量是成正比的，這是一個極為重要的實驗事實Itisverysignificantempiricalfactthattheinertialandgravitationalmassesofabodyareproportionaleachother161.是件在很大程度上確定了該系統(tǒng)的能力isthehardwarewhichdeterminestoalargedegreecapabilitiesofthesystem162.正這些優(yōu)點使阿拉伯數(shù)字為全世界人們所接受Itthesestrongpointsthat