电子信息工程专业英语课件22.pptVIP

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。 Engineers may find the book of value as a reference on basic problems. What is described in this section is of great importance. 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。 Of all the computers in this laboratory, this one works best. Of all the four parameters, three can be disposed of rather quickly. 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 The lighter machine part has a mass of 7 kg. This device can supply 4 mA of output drive current. 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.2 shows the variation of the output with the input. Ellipses are used to describe the motions of the planets around the sun. 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 The resolution of a force into x- and y-components is possible. Exposure of the body to potentially toxic substances should be avoided. 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 These experiments should be done with care. This parameter can be measured with accuracy. (2)With与vary,change,increase,decrease等动词连用时可表示“随着……”之意。 The conductivity of a semiconductor varies with temperature. 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 With friction present, a part of power has been lost as heat. (4)将with 用在句首可表示“对了，有了”等意思 With the alternating current, things are different. With radar, we can see distant objects. 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 In this case v and i differ in phase by 90°. (2)by可表示“根据，按照”，主要用在推导之中 By Eq.(3), we can obtain the following expression. (3)“by+动名词”一般可表示“通过……”之意 By an examination of the performance of the device, we can understand its features. By analyzing this model, one can learn about the structure of an atom. 第一节 词类—介词 4.for (1)for 可表示时间或距离的长短 The output may stay high for a long time. (2)for 可表示“对于，当……时候，如果……的话” For x1, this equation does not hold. This book is too difficult for a beginner. 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 It is necessary for us to solve this equation for x. (4)在method,technique,equat