科技英语写作

科技英语写作数词分数：Eightninths九分之八；threefifths五分之三；seventenths十分之七；oneseventh七分之一；onefourth/aquarter四分之一；one/ahalf二分之一小数:afewtenths零点几（十分之几）；afewhundredths零点零几（百分之几）；afewthousandths零点零零几（千分之几）；afewmillionths百万分之几表示：分数表示法+ofa/an+单位（单数形式）例：sevenpartspermillion=sevenpartsin10的6次方百万分之七Threepartsperthousand=threepartsin10的3次方千分之三Athirdpartin10的6次方百万分之三Aseventhpartin10的3次方千分之七翻译：1.这只是汽化热的千分之几译：Thisisonlyafewthousandthsoftheheatofvaporization.2.这药丸重零点零几克。译：Thispillweighsafewhundredthsofagram.3.要使Vbe变化零点零几伏，就可以使基极电流发生明显的变化。译：ByvaryingVbeonlyafewhundredthsofavolt,thebasecurrentcanbechangedsignificantly.4.输出是输入的100倍。译：Theoutputis100timestheinput.5.其速度为光速的3/10。译：Itsspeedisthreetenthsthatoflight.6.施加在该物体上的力为原来的2/5。译：Theforceexertedonthebodyistwofifthswhatitwas.7.这只箱子比那只重5倍。译：Thisboxissixtimesheavierthanthatone.8.该数值几乎比理想值大了3.5倍。译：Thisvalueisnearly4.5timesgreaterthantheidealone.9.这个音符的波长比在空气中同一音符长了两倍多。译：Thewavelengthofthismusicalnoteisoverthreetimeslongerthanthatofthesamenoteinair.练习1.该电路中的电流为电源的短路电流的一半。Thecurrentinthecircuitisonehalftheshort-circuitcurrentofthesource.2.这种蓄电池的内阻仅为零点零零几欧姆。Theinternalresistanceofthiskindofstoragebatteryisonlyafewthousandthsofanohm.3.其误差为6/1012.Itserrorissixpartsin1012.4.这台计算机储存的信息比那台多3倍。Thiscomputerstoresfourtimesmoreinformationthanthatone(does).5.月球的质量为地球的1/81。Themassofthemoonis1/81thatoftheearth.6.不久的将来对这种设备的需求量将为现在的20倍。Thedemandforthiskindofequipmentinthenearfuturewillbe20timeswhatitis.7.这个元件上的电压为零点几伏特。Thevoltageacrossthiscomponentisafewtenthsofavolt.8.现在其内部的压力是原来的1/3。Nowitsinternalpressureisonethirdwhatitwas.冠词练习一、1.Therehasbeen__an___evergreaterinterestinthissubject.2.Thepowerratingisthemaximumpowertheresistorcansafelydissipatewithouttoogreat___a__riseintemperature.3.Itsprimarydisadvantageis_an____increaseinnoise.4._The____successfuldesignoftheequipmentrequires__a__detailedknowledgeoftheperformancespecifications.5.In_the____Bohrmodelofthehydrogenatom,__a___singleelectronrevolvesaround_a_singleprotoninacircleofradiusR.6.Theunitoffrequencyis_the____hertz.7.If___a__voltageisappliedacross__a___circuit,__an___electriccurrentwillflowin__the__circuit.8.__/__Fig.5-1shows__/___Oersted’sexperiment.9.Weshoulduse_an____18-voltbatteryhere.10._A___machineis_a____devicefortransmittingforcetoaccomplish_a_definitepurpose.11.__The__hydraulicpresswillbeconsideredin__/__Chapter14.12._The___studyoffluidsinmotionisoneof__the___moredifficultbranchesofmechanicsbecauseof__the___diversityofphenomenathatmayoccur.13.Itiseasytodetermine___the_valueof_the(/)____parameterμ.14.By_/_Eq.(2-1)wehave__the___followingrelation.15.Itisnecessaytouse__an___S-shapedtubehere.16.Theauthorsworkat__the___UniversityofTexasat__/___Arlinton.17.Thisis___an__R-bittransformer.18.__An___XORgatemustbeusedhere.II1、这是一个h参数。Thisisanhparameter.2、现在我们转向讨论一下局域网.Weturnnowtoadiscussionoflocalareanetworks.3、质谱仪是与光谱仪一样重要的仪器。TheBainbridgemassspectrometerisasimportantaninstrumentastheopticalspectrometer.4、必需求出为使一个电子通过这一段导线需要多长的时间。Itisnecessarytofindouthowlongatimeisrequiredforanelectrontotravelthelengthofthewire.5、物质的密度是其每单位体积的质量。Thedensityofasubstanceisitsmassperunitvolume.6、地球的半径为6.37×106米。Theradiusoftheearthis6.37×106m.7、这两个参数是相同的。Thetwoparametersarethesame.8、压力的增加总会引起体积的减少。Anincreaseinpressurealwayscausesadecreaseinvolume.9、图2-5画出了式2-2所表示的情况。Fig.2-5showswhatisexpressedbyEq.2-2.10、电感的单位是亨利。Theunitofinductanceisthehenry.11、输入信号太大会引起非线性失真。Toolargeaninputsignalcancausenonlineardistortion.12、利用斜率的定义，我们能导出表示直线的方程。Usingthedefinitionofslope,wecanderivetheequationwhichrepresentsastraightline.13、f(x+h)-f(x)这一表达式经常用在学习微积分中。Theexpressionf(x+h)-f(x)isfrequencyusedinthestudyofcaculus14、能写成以下形式的方程被称为含有一个未知数的线性方程。Anequationwhichcanbewritteninthefollowingformisknownasalinearequationinoneunkown.15、Inacomputer,thetendencyistooperateatashighaclockrateaspossible.16、锡的熔点没有铅的高。（要求使用“haveas…as”句型）Tindoesnothaveashighameltingpointaslead(does).17、这个平均速度是末速度的一半。Thisaveragevelocityishalfthefinalvelocity.18、电可以容易地被转变成其它形式的能量。Electricitycanbeeasilychangedintootherformsofenergy.19、1831年，美国的约瑟夫·亨利发现了电磁感应现象。In1831,JosephHenryintheUnitedStatesdiscoveredthephenomenonofelectromagneticinduction.20、计算机是有几部分组成的。Acomputerconsistsofseveralparts/units.定语从句I、将下列句子译成英语，要求把划线部分用定语从句或含有定语从句的东西来表示1.原子的大部分质量集中在原子核内，这就解释了为什么原子核在原子内部几乎是静止不动的。Mostoftheatomicmassisconcentratedinthenucleus,whichexplainswhythenucleusisalmoststationarywithintheatom.2.法拉第是发现电磁感应现象的伟大科学家。Faradaywasthegreatscientistwho/thatdiscoveredthephenomenonofelectromagneticinduction.3.这是用来测量该参数的设备。Thisisthedevicewhich/thatisusedtomeasuretheparameter.4.我们用来测量一个电阻上的电压的仪表称为电压表。Themeter(that/which)weusetomeasurethevoltageacrossaresistoriscalledvoltmeter.5.要做的第一件事是确定这个容器内部的压力。Thefirstthingthatistobedoneistodeterminethepressurewithinthiscontainer.6.计算机是人类所曾有过的最有效的助手。Computersarethemostefficientassistants(that)manhaseverhad.7.在这种情况下已经储存的任何信息将会丢失Inthiscase,anythingthathasbeenstoredwillbelost.8.还有另一种力我们需要加以考虑。Thereisanotherkindofforce(that)weneedtoconsider.9.现在这种病不再是原来那样的严重问题了。Nowthisdiseaseisnolongertheseriousproblem(that)itoncewas.10.小型计算机的应用场