电子信息专业英语课件.ppt

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1、Unit1科技英语基础知识Unit8DataCommunicationsUnit2ElectricalTechniqueUnit93rdGenerationMobileUnit3MicroelectronicsCommunicationsUnit4ElectronicCommunicationsUnit10ImagesandTelevisionsUnit5DigitalmodulationUnit11OpticalFiberUnit6DigitalSignalProcessingCommunicationUnit12ModernSwitchingTechniqueUnit7ISDNUnit1

2、科技英语基础知识1.1科技英语的特点复杂长句多将其分解为适当数目的简单分句，使之简化。例1.Theelectronbeamsweepsacrosseachlineatauniformrate,thenfliesbacktoscananotherlinedirectlybelowthepreviousoneandsoon,untilthehorizontallinesintowhichitisdesiredtobreakorsplitthepicturehavebeenscannedinthedesiredsequence.可将其分解为：beamsweepseachline.thenflies

3、backtoscananotherline.itisdesiredtobreakpictureintolinesindesiredsequence.例2.Thetechnicalpossibilitiescouldwellexist,therefore,ofnation-wideintegratedtransmissionnetworkofhighcapacity,controlledbycomputers,interconnectedgloballybysatelliteandsubmarinecable,providingspeedyandreliablecommunicationsth

4、roughouttheworld.该句的骨架是：Thepossibilitiesofnetworkcouldexist.被动语态多科技英语为了避免主观性和个人色彩，常用被动语态。译时可译为“被”、“经过”、“受了”、“由于“等。例3Adatabasemaybedesignedforbatchprocessing,real-timeprocessing,orin-lineprocessing.例4Ifweconsiderbinarytransmission,thecompleteinformationaboutaparticularmessagewillalwaysbeobtainedbysi

5、mplydetectingthepresenceorabsenceofpulse.例5Noisecanbeintroducedintotransmissionpathinmanydifferentways,perhapsviaanearbylightingstrike,thesparkingofacarignitionsystem,orthethermallow-levelnoisewithinthecommunicationequipmentitself.Lightingstrike照明Ignitionsystem点火系统thermalnoise热噪声非谓语动词多英语语法要求，每个简单句只

6、能有一个动词。如果有几个动作，则选出一个主要动作当谓语，其余动作用非谓语动词表示。非谓语动词动名词分词（包括现在分词和过去分词）不定式例6Tobeatrueprofessionalrequireslifelonglearning.例7Heatingwaterdoesnotchangeitschemicalcomposition.词性转换多英语单词中有不少是多性词：既是名词，又可作动词、形容词、介词等。如：currentadj当前的n电流determinantadj确定的n行列式potentialadj潜在的n电位多是论述性问题，感情色彩淡句子力求简单严谨，因此常用省略手法和图表表示法词语力求

7、短小精悍，常用复合词文章力求层次分明，多用连接词用词较正规，多为技术性用词1.2词汇词汇普通词汇专业词汇缩写词汇转义词汇虚义词常用专业词汇electrondiodetransistorfield-effecttransistor(FET)oscillatorradioanodecathode电子二极管晶体管场效应晶体管振荡器无线电通信（接收装置）阳极阴极triode三极管Ohm’slawamplifiermi