《电子专业英语》-第1章

Awireisusedtotransmittedenergy…Aswitchcanjoinorbreakthewires.TextComprehensionCircuitsAnelectriccircuitoftenconsistsoffourbasicparts:thepowersupplysuchasabattery,theconductorsorwires,thecontroldevicesuchasaswitch,andtheloadorelectricappliance,whichconvertstheelectricalenergyintootherformsofenergy.Oneormorecircuitscanberegardedasanetwork.Thenetworkconsistsofseveralelementssuchasbranches,nodes,andloops.Abranchrepresentsasingleelementsuchasaresistor,avoltagesourceoracurrentsource.Anodeisthepointofconnectionbetweentwoormorebranches.Aloopisanyclosedpathinanetwork.Unit1Circuit上一页下一页返回Acircuitusuallyhavethreestates:closedcircuitorloop,inwhichcurrentflows,opencircuit(Acircuitthatisdisconnected,that’stosay,nocurrentflowsinit.)andshortcircuit(Insuchacircuit,nocurrentpassesthroughtheload.).Generallyspeaking,weshouldavoidthelastoneinourlives.Ifithappens,thepowersupplyandthewirewillbeburntout.Seriesandparallelcircuitsarethemosttypicalcircuitsknown.Inaseriescircuit,thecurrenthasonlyonepathtofollow.Therearenobranches.Oneswitchwillturnthewholecircuitonoroff.However,inaparallelcircuit,thereareseveralpaths.Switchescanbeusedtoturnthewholeorjustpartofthecircuitonoroff.Unit1Circuit上一页下一页返回Vocabularyelectric adj. 电的，导电的

circuit n. 电路power n 电力，能力battery n. 电池conductor n. 导线，导体switch n. 开关load n 负载load n 负载convert vt.

使转变，转换……element n. 要素，元件Unit1Circuit上一页下一页返回branch n 分支，支路node n 节点loop n (闭合)回路，回线represent vt. 描绘，代表，表示resistor n. 电阻器voltage n 电压current n.

电流state n. 状态disconnect vt

断开series n. 串联parallel n.

并联Unit1Circuit上一页下一页返回Phrasesandexpressions1.consistof 由……组成，由……构成2.powersupply 电源3.beregardedas 把……看作4.voltagesource 电压源5.currentsource 电流源6.burnout 烧坏，烧断1.suchas引出的一般是同位语。同位语一般是把一个名词或代词放在另一个名词或代词的之后，用来说明前一个名词或代词的性质或情况，进一步说明它代表的是谁或者是什么事物，例如：Therearedifferentformsofenergy,suchaselectricenergy,heatenergyandmechanicalenergy.能有多种形式，如电能、热能和机械能。Unit1Circuit上一页下一页返回2.“whichconvertstheelectricalenergyintootherformsofenergy”作“theelectricappliance”的定语。全句译为：用电器把电能转变成其他形式的能量。convert…into…把……转变成……例如：Thepowersupplycanconvertotherformsofenergyintoelectricalenergy.电源可以把其他形式的能转化成电能。3.“known”过去分词作“circuits”的后置定语。ComprehensiveExerciseIChoosetherightanswerfromA,B,andCaccordingtothetext.【】1.Afunctionalcircuitconsistsofthepowersupply,conductors,loadand________.A.wires B.switch C.electricappliance【】2.Aloopis_______________.A.closedcircuit B.opencircuit C.anycircuitUnit1Circuit上一页下一页返回【】3.Themosttypicalcircuitsare________________.A.seriescircuitB.parallelcircuitC.seriesandparallelcircuits【】4.Doescurrentflowinthecircuitwhenitisdisconnected?A.Yes. B.No. C.hardtosay.【】5.Apowersupply_________________.A.provideselectricenergytotheenergyB.consumeselectricenergyC.transmitselectricenergyIITrueorfalse.□1.Wecanoftenfindfourbasicpartsinacircuit:powersupply,conductors,aswitchandaload. □2.Anodeisanypointinanetwork. □3.Aloopisanypathinacircuit. □4.Thereisnocurrentinashortcircuit. □5.Thereareseveralpathsinaparallelcircuit.Unit1Circuit上一页下一页返回IIITranslatethefollowingsentences.1.Anelectriccircuitoftenconsistsofthepowersupply,thewires,aswitchandtheload.2.Thenetworkconsistsofseveralelementssuchasbranches,nodes,andloops.3.Anodeisthepointofconnectionbetweentwoormorebranches.4.Acircuitusuallyhasthreestates:closedcircuit,opencir