《電子專業英語》-第1章

Awireisusedtotransmittedenergy…Aswitchcanjoinorbreakthewires.TextComprehensionCircuitsAnelectriccircuitoftenconsistsoffourbasicparts:thepowersupplysuchasabattery,theconductorsorwires,thecontroldevicesuchasaswitch,andtheloadorelectricappliance,whichconvertstheelectricalenergyintootherformsofenergy.Oneormorecircuitscanberegardedasanetwork.Thenetworkconsistsofseveralelementssuchasbranches,nodes,andloops.Abranchrepresentsasingleelementsuchasaresistor,avoltagesourceoracurrentsource.Anodeisthepointofconnectionbetweentwoormorebranches.Aloopisanyclosedpathinanetwork.Unit1Circuit上一頁下一頁返回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上一頁下一頁返回Vocabularyelectric adj. 電的，導電的

circuit n. 電路power n 電力，能力battery n. 電池conductor n. 導線，導體switch n. 開關load n 負載load n 負載convert vt.

使轉變，轉換……element n. 要素，元件Unit1Circuit上一頁下一頁返回branch n 分支，支路node n 節點loop n (閉合)回路，回線represent vt. 描繪，代表，表示resistor n. 電阻器voltage n 電壓current n.

電流state n. 狀態disconnect vt

斷開series n. 串聯parallel n.

并聯Unit1Circuit上一頁下一頁返回Phrasesandexpressions1.consistof 由……組成，由……構成2.powersupply 電源3.beregardedas 把……看作4.voltagesource 電壓源5.currentsource 電流源6.burnout 燒壞，燒斷1.suchas引出的一般是同位語。同位語一般是把一個名詞或代詞放在另一個名詞或代詞的之后，用來說明前一個名詞或代詞的性質或情況，進一步說明它代表的是誰或者是什么事物，例如：Therearedifferentformsofenergy,suchaselectricenergy,heatenergyandmechanicalenergy.能有多種形式，如電能、熱能和機械能。Unit1Circuit上一頁下一頁返回2.“whichconvertstheelectricalenergyintootherformsofenergy”作“theelectricappliance”的定語。全句譯為：用電器把電能轉變成其他形式的能量。convert…into…把……轉變成……例如：Thepowersupplycanconvertotherformsofenergyintoelectricalenergy.電源可以把其他形式的能轉化成電能。3.“known”過去分詞作“circuits”的后置定語。ComprehensiveExerciseIChoosetherightanswerfromA,B,andCaccordingtothetext.【】1.Afunctionalcircuitconsistsofthepowersupply,conductors,loadand________.A.wires B.switch C.electricappliance【】2.Aloopis_______________.A.closedcircuit B.opencircuit C.anycircuitUnit1Circuit上一頁下一頁返回【】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上一頁下一頁返回IIITranslatethefollowingsentences.1.Anelectriccircuitoftenconsistsofthepowersupply,thewires,aswitchandtheload.2.Thenetworkconsistsofseveralelementssuchasbranches,nodes,andloops.3.Anodeisthepointofconnectionbetweentwoormorebranches.4.Acircuitusuallyhasthreestates:closedcircuit,opencir