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第一节词类—介词•1.of–(1)“of+某些抽象名词”等效于这些名词相应的形容词,但语气更强。Engineersmayfindthebookofvalueasareferenceonbasicproblems.Whatisdescribedinthissectionisofgreatimportance.第一节词类—介词•1.of–(2)Of可表示“在……之中”,既可用作最高级的比较范围,也可用在一般的句子中。Ofallthecomputersinthislaboratory,thisoneworksbest.Ofallthefourparameters,threecanbedisposedofratherquickly.第一节词类—介词•1.of–(3)Of可表示其前后两者处于同位关系Thelightermachineparthasamassof7kg.Thisdevicecansupply4mAofoutputdrivecurrent.第一节词类—介词•1.of–(4)其后面的名词是其前面的名词的逻辑主语Fig.2showsthevariationoftheoutputwiththeinput.Ellipsesareusedtodescribethemotionsoftheplanetsaroundthesun.第一节词类—介词•1.of–(5)其后面的名词是其前面的名词的逻辑宾语Theresolutionofaforceintox-andy-componentsispossible.Exposureofthebodytopotentiallytoxicsubstancesshouldbeavoided.应避免使人体接触有潜在毒性的物质。第一节词类—介词•1.with•(1)“with+某些抽象名词”等效于这些名词所对应的副词,但语气更强•Theseexperimentsshouldbedonewithcare.•Thisparametercanbemeasuredwithaccuracy.•(2)With与vary,change,increase,decrease等动词连用时可表示“随着……”之意。•Theconductivityofasemiconductorvarieswithtemperature.第一节词类—介词•2.with–(3)可构成一种“with结构”,其应用特别广泛Withfrictionpresent,apartofpowerhasbeenlostasheat.–(4)将with用在句首可表示“对了,有了”等意思Withthealternatingcurrent,thingsaredifferent.Withradar,wecanseedistantobjects.第一节词类—介词•3.by–(1)by可表示除了时间和距离外的任何参量的数值Inthiscasevandidifferinphaseby90°.–(2)by可表示“根据,按照”,主要用在推导之中ByEq.(3),wecanobtainthefollowingexpression.–(3)“by+动名词”一般可表示“通过……”之意Byanexaminationoftheperformanceofthedevice,wecanunderstanditsfeatures.Byanalyzingthismodel,onecanlearnaboutthestructureofanatom.第一节词类—介词•4.for–(1)for可表示时间或距离的长短Theoutputmaystayhighforalongtime.–(2)for可表示“对于,当……时候,如果……的话”Forx1,thisequationdoesnothold.Thisbookistoodifficultforabeginner.第一节词类—介词•4.for–(3)for与动词solve连用表示方程所要求解的对象Itisnecessaryforustosolvethisequationforx.–(4)在method,technique,equation,algorithm,condition,requirement等词后多用for.Thereareseveralmethodsforantennadesign.第一节词类—介词•5.on和upon在on和upon之后跟有动名词或表示动作的名词时,一般表示“一……就”和“在……之后”之意Onsimplifying,theresultbecomesasfollows.Uponrearrangingtheaboveequations,wegettothefollowingsetofequations.第一节词类—介词•6.in–(1)in后跟表示单位的名词复数时,意为“用”Heretismeasuredinseconds.–(2)in后跟表示方向的词时,意为“朝”Radiowavestravelinalldirections.–(3)in可表示“方面”Thiscomputerisgoodinquality.第一节词类—介词•6.in–(4)in后跟动名词或表示动作的名词时,意为“在……时候”、“在……过程中”Inourdiscussionofdifferentialequations,weshallrestrictourattentiontoequationsofthefirstdegree.–(5)在名词reduction,decrease,increase,change,drop,rise,fall等后多用inWecanmeasuretheslightchangeinpressure.
本文标题:电子信息工程专业英语课件22
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