电气信息类科技英语教程 教学课件 作者 何宏 PART I Unit1 An Introduction to EST.ppt

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1、2021/8/121EnglishforElectricalInformationTranslationtechniquesEnglish-ChineseChinese-English电气信息类科技英语2021/8/122Unit1AnIntroductiontoEST1TheConceptionofESTESP-EnglishforSpecialPurposesESPconsistsofEAP,EOPandEST.EAP-EnglishforAcademicPurposesEOP-EnglishforVocatio

2、nalorOccupationalPurposesEST-EnglishforScienceandTechnology电气信息类科技英语2021/8/123EAPEverytermpaperisahighlyindividualizedpieceofwork.Nonetheless,therearesomegeneralrulesandguidelinestofollowingathering,selecting,andrecordinginformationfortheroughdraftofapaper.Diffe

3、renttopicswillrequiretheuseofdifferentinformationsources,butthereanumberofreferencetoolsthateverystudentshouldbeabletousewithease.电气信息类科技英语2021/8/124EOPAwidevarietyofaccommodationisavailabletothemoderntourist.Itvariesfromtheguesthouseortouristhomewithoneortworoo

4、mstograndluxuryhotelswithhundredsofrooms.AfeatureofEuropeisthepension,asmallestablishmentwithperhapstentotwentyguestrooms.电气信息类科技英语2021/8/125ESTEST≠GeneralEnglishGrammar+TechnicalWordsESST-EnglishforSpecializedScienceandTechnology(专业科技英语)CapacitorsCapacitorsplay

5、avitalroleinmodernelectronics.Acapacitorisadeviceconsistingoftwoconductorsseparatedbyvacuumoraninsulatingmaterial.Capacitorsareusedinawidevarietyofelectriccircuitsandareavitalpartofmodernelectronics.Whenchargesofequalmagnitudeandoppositesignareplacedontheconduct

6、orsofacapacitor,anelectricfieldisestablishedintheregionbetweenthem,withacorrespondingpotentialdifferencebetweentheconductors.Therelationsamongcharge,field,and电气信息类科技英语2021/8/126potentialcanbeanalyzedbyusingtheresultsofthetwoprecedingchapters.Foragivencapacitor,t

7、heratioofchargetopotentialdifferenceisaconstant,calledthecapacitance.Placingchargesontheconductorsrequiresaninputofenergy;thisenergyisstoredinthecapacitorandcanberegardedasassociatedwiththeelectricfieldinthespacebetweenconductors.Whenthisspacecontainsaninsulatin

8、gmaterial(adielectric)ratherthanvacuum,thecapacitanceisincreased.WhenwespeakofacapacitorashavingchargeQ,wemeanthattheconductorathigherpotentialhasachargeQandtheconduc