西电硕士专业英语阅读第二版答案.docx

西电硕士专业英语阅读第二版答案.docx

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西电硕士专业英语阅读第二版答案

V、练习参考答案

练习1

1.艾米特博士毕业Dr.EmmetgraduatedfromHarvardUniversityin2001.

2.李教授1988理工大或机械博士ProfessorLiearnedhisPh.D.degreeinmechanicalengineeringfromtheXi’anUniversityofTechnologyin1988.

3.现在转向讨论局域网Nowweshallturntothediscussionoflocalareanetworks.

4.质谱仪光谱仪一样重要TheBainbridgemassspectrometerisasimportantaninstrumentastheopticalspectrometer.

5.做个试验要多长Howlongatime[或Howmuchtime]isrequiredtothisexperiment?

Thedensityofasubstanceisitsmassperunitvolume.

压力增加体积减少

6.Anincreaseinpressurealwayscausesadecreaseinvolume.

图画出了2-2的情况

7.Fig.（2-5）showswhatisexpressedbyEq.（2-2）.

电感的单位是亨利

8.Theunitofinductanceisthehenry.

练习2

该电路由一个电池电感器电容器组成

1.Thiscircuitconsistsofabattery,aninductorandacapacitor.

试计算在abc三点处的电场

2.Computetheelectricfieldsatpointsa,b,andc.

3.这颗卫星用于美国与英国法国意大利的通讯ThissatelliteisusedforcommunicationsbetweentheUnitedStatesandGreatBritain,FranceandItaly.

4.我们假设该天线是垂直的且其损耗为零Weassumethattheantennaisverticalandthatitslossiszero.

5.第678章论述传输线Chapters6,7,and8dealwithtransmissionlines.

II、

1.其误差为千亿分之六Itserrorissixpartsin1012.

2.这台计算机所存储的信息比那多3倍Thiscomputerstoresfourtimesmoreinformationthanthatone（does）.

3.不久的将来对这种设备的需求量为现在的20倍Thedemandforthiskindofequipmentinthenearfuturewillbe20timeswhatitis.

4.这个元件电压为零点几伏特Thevoltageacrossthiscomponentisafewtenthsofavolt.

5.现在其内部的压力被减少了15倍Nowitsinternalpressureisonesixteenthwhatitwas.

1.这种新型计算机与普通相比许多优点Thisnewtypeofcomputerhasmanyadvantagesoverthegeneraltype.

2.解这个微分方程把未知量求出来不困难Itisnotdifficulttosolvethisdifferentialequationfortheunknownquantity.

3.在这新的五章中，第一章论述反馈的Ofthesefivenewchapters,thefirstonedealswiththebasicprinciplesofnegativefeedback.

4.这时，电流与电压相位差90度Atthispoint/time,currentdiffersinphasefromvoltageby90o.

5.通过分析该仪器的参数就能够了解他的性能Byanalyzing[Bytheanalysisof]theparametersoftheinstrument,wecanunderstanditsperformance.

6.我们要求出它在这一距离上的平均速度Wewillfindoutitsaveragevelocityoverthisdistance.

7.电子学这门学科在现今世界太重要Thescienceofelectronicsistooimportantintheworldtoday.

8.他们极为困难滴解出了这道题Theysolvedthisproblemwithgreatdifficulty.

II、

1.若x>1则方程成立Forx＞1,thereisnosolutiontothisequation[thisequationhasnosolution].

2.在吧这些数值代入该方程后，我们得到了下面的表达式Upon[On]substituting[substitutionof]thesevaluesinto[in]theequation,weobtainedthefollowingexpression..

3.这个电路的工作情况类似图10-1的电路ThiscircuitissimilarinoperationtothatofFig.1-10.

4.这台电脑性能很好Thiscomputerisverygoodinperformance.

5.这些波只向一个方向传播Thesewavestravelonlyinonedirection.

练习4

1.该力垂直于桌面Theforceactsperpendiculartothesurfaceofthetable.

2.这里的三个系数有待于确定Thethreecoefficientshereremainstobedetermined.

3.下面两个十字在后面几章将会经常用到Thetwoequationsbelowwillbeoften（frequently）usedinlaterchapters/inthechapterswhichfollow.

4.这里我们使用相距10里面的两个金属球Hereweusetwometalballs10cmapart.

5.输出保持不变Theoutputremains/staysconstant/unchanged/fixed/unaltered/thesame.

6.现有的教科书均讨论了这一问题Allthetextbooksavailablediscussthisproblem.

7.计算机由于运算精准，速度快而得到了广泛应用Accurateinoperationandhighinspeed,computershavefoundwideapplications.

8.这个题的答案看起来是正确的Theanswertothisproblemlookscorrect.

9.我们将使用一段相距距离为的两根平行导线Twoparallelwiresadistance（of）δapartcarrythecurrenti.

10.现在的问题是如何测量这个元件上的电压Theproblemnowishowtomeasurethevoltageacrossthiscomponent.

11.这些数据将被传到2千米外的计算中心Thesedatawillbesenttothecomputingcenter2kilometersaway.

12.在对上面的那个方程整理后，我们得到了下面表达式Uponrearrangingtheequationabove,wehave[get,obtain]thefollowingexpression.

13.这些电荷能与存在的其他电荷相互作用Thesechargescaninteractwithotherchargespresent.

14.里可以没有接触而被传递，这与普通的观念相反Forcescanbetransmittedwithoutcontact,contrarytothecommonbelief.

15.这个系数的典型值为Thiscoefficientistypically0.35.

练习5

I、

1.这个方程我们可以用一下两种中任何一种来解Thisequationcanbesolvedineitherofthefollowingtwoways/thetwowayswhichfollow.

2.这个棒球不就会停下来是因为他与地面相互作用Thisbaseballwillsooncometorestbecauseofitsinteractionwiththeground.

3.我们把这个系数选为一是正确的Ourchoiceofthiscoefficientas1iscorrect.

4.从把它定义为力与长度之比，我们可以看出kFromitsdefinitionastheratioofaforcetoalength,wecanseethatkhasthesameunitaswork（does）.

5.我门对该机器的分析是很有意义的Ouranalysisofthemachineisofgreatsignificance.

6.这有助于吧他们用在电路分析中Thisfacilitatestheiruseincircuitanalysis.

II、

1.这辆警车装备了想火柴盒那样大小的接收机Thispolicecarisequippedwithareceiverthesizeofamatchbox.

2.人们使用一根丝线的百分之一那样粗洗的导线来连接这些部件Wiresonehundredththediameterofasilkthreadareusedtoconnectthesecomponents.

3.我们必须对这些设备进行水冷却Wemustwatercooltheseequipments/devices.

4.在过去，电话是靠接线员来连接的Inthepast,telephonecallswereoperatorconnected.

5.交流电可以转换成直流电，这一过程被称为整流ACcanbechanged/turned/converted/transformed/translatedinto/toDC,aprocesscalled/knownas/referredtoasrectification.

6.磁铁能吸引铁质材料，这是大家熟悉的现象Amagnetattractsironmaterials,afamiliarphenomenon.

7.计算机能够处理信息二这一过程以前头脑Computersarecapableofprocessinginformation,aprocessthatpreviouslycouldbeaccomplishedonlyinsideourheads.

8.外用表量电压电流电阻仪表，广泛使用在电气工程中Aninstrumentformeasuringcurrent,voltage,andresistance,themultimeteriswidelyusedinelectricalengineering.

III、

1.第1.11.2节讨论其他几个问题Secs.1.1and1.2willdiscussseveralotherproblems.

2.Problemsarelisted/givenonpp.1-5.

3.Intheequationsabove,allh’sarethehybridparameters.

4.Themassofthestandardpoundisequalto0.4535924277kilograms.

5.Alla’sandb’sinEq.（5-1）arerelatedtotheimpedanceRo.

6.Wemusttaketheeffectoftemperatureon[upon]semiconductorsinto

account.

7.Inthiscase,thevariationofoutputwithinputisverysmall.

8.Thiscurveshowsthedependenceofdistanceon/uponspeed.

练习6

I、

1.人们会注意到这个头像是实像Thisimage,itwillbenoticed,isarealimage.

2.我们希望，这个技术问题不久就会解决Thistechnicalproblem,wehope,willbesolvedsoon.

3.这一点我们认为在学习数字电子学中是很有用的210isapproximately1000,afactthatwethinkisveryusefulinthestudyofdigitalelectronics.

4.这里应该使用一个比如说100欧的电阻器Aresistorofsay100ohmsshouldbeusedhere.

II、

1.这些教科书中均没有提到Noneofthosetextbookshave/hasmentionedthispoint.

2.这些x的值并非都能满足该方程Allofthesexvaluescannotsatisfytheequation.

3.那两个条件在此均没有得到满足Neitherofthetwoconditionsissatisfiedhere.

4.在前一章，我们讨论了能量Inthepreceding/previouschapter,wediscussedallkindsofforce.

5.本文论述了设计飞机的一种新方法Thispaperdescribesanewmethodfordesigningaircraft.

6.到上世纪末该公司制造了雷达Bytheendofthelastcentury,thecompanyhadmanufactured5000

radars.

7.从2008，这个研究所一直在开发一种特殊机器人Since2008,thisresearchinstitutehasbeendevelopingaspecialkindofrobot.

III、

1.介绍李的概念InSection1-2,theconceptofforcewasintroduced.

2.半导体是非常有用的Asearlyasthe1940s,itwasfoundthatsemiconductorsareveryuseful.

3.这一结果也能另法获得Thisresultcanalsobearrivedatinanotherway.

4.当时人们没有使用那一现象Atthattimenousewasmadeofthisphenomenon/…,thisphenomenonwasmadenouseof.

5.这一点下一章谈论Thispointwillbedealtwithinthenextsection.

IV、

1.Thiscomputerworksmuchbetterthanthatone（does）/Thiscomputerismuchbetterinperformancethanthatone（is）..

2.所需元件多得多Thiscomputerrequiresmanymorecomponentsthatthatone（does）.

3.月离地24万英里Thedistanceofthemoonfromtheearthisasgreatas240000miles.

4.电阻越大，电容器达到其最大电压所需时间越长Thegreatertheresistance,thelongertimeittakesforthecapacitortoreachitsmaximumvoltage/…,thelongertimeisrequiredforthecapacitortoreachitsmaximumvoltage.）

5.01a电流不能产生足够热Thecurrentassmallas0.1Acannotproduceenoughheat.

练习7

I、

1.借助于计算机设计这种飞机至于要几个月的时间Itwilltakeafewmonthstodesignthiskindofaircraftwiththehelpofacomputer.

2.证明这个表达式成立就留作读者的一个习题Itisleftasaproblemto[for]thereadertoshowthatthisexpressionholds.

3.要执行的程序存储在这一单元Theprogramtobeexecutedisstoredinthisunit.

4.这山谷用作为建大坝的基础Thisvalleyactsasthefoundationonwhichtobuildthedam.

5.这实验室中有许多种仪表供学生选择Inthislaboratorytherearemanykindsofinstrumentforstudentstochoosefrom.

6.设等于零Lett0equal/beequaltozero.

7.目标离得越远，回拨返回所需时间越长Thefartherawaythetarget（is）,thelongertimeittakesfortheechotoreturn.

8.为是该级数收敛，x必须小于1Fortheseriestoconverge,xmustbelessthan1.

9.我们发现这个概念很难理解Wefindthisconceptverydifficulttounderstand.

10.这方法使得检测目标容易多了Thismethodmakesitmucheasiertodetecttargets.

11.这个因素会影响计算机存储信息的能力Thisfactorwillaffecttheabilityofacomputertostoreinformation.

12.我们求出是r为多大时才能使用该级数收敛Wehavetofindouthowlargetomakersoasfortheseriestoconverge.

13.这是画画所用的笔Thisisapentodrawpictureswith.

14.弹性是物体形变后能恢复原状的趋势Elasticityisthetendencyofabodytoreturntoitsoriginalconditionafterbeingdeformed.

15.普通物质是电中性的Ordinarymatterissaidtobeelectricallyneutral.

16.这一性质使得金属能够被做成任何形状Thispropertymakesitpossibleformetalstobemadeintoanyshape.

17.这张桌子不适宜学生试验Thistableisunfitforastudenttodoexperimentson.

18.现在我们考虑去什么样的积分路径Nowweconsiderwhatpathofintegrationtotake.

II、

练习8

I、

1.放大器放大接收信号Theamplifieramplifiesthereceivedsignals.

2.运动分子具有动能Movingmoleculeshavekineticenergy.

5.Fig.1–3showsthephotoofafreelyfallingbody.

3.速度等于距离除以时间Speedequalsdistancedividedbytime.

4.电压等于电流乘以电阻Voltageequals/isequaltocurrentmultipliedbyresistance.

5.空气阻力随速度增加为增加Theresistanceofairincreaseswiththeincreased/increasing/anincreaseinspeed.

6.变压器是绕在铁芯的两个多个圈组成Atransformerisadeviceconsistingoftwoormorecoilswoundon/roundanironcore.

7.流过这个元件上的电流Itisnecessarytofindoutthecurrentflowingthroughthiscom