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1、词类转换,英语属于印欧语系，汉语属于汉藏语系。 同一意思在不同语言中可以用不同的词类来表达。 所谓词类转换，是指把原文语言中的某一词类转译成汉语的另一词类。,转换成汉语动词,名词转换成动词 Global warming observed over the past century has focused attention on manmade greenhouse gas, presumed to be the likely cause. 在过去的一个世纪中发现的全球变暖趋势据推测可能是由人为的温室气体造成的。 Law enforcement agencies went on a hunt
2、for hackers in the aftermath of the AT&T system crash of 15 January 1990. 执法机构继续通缉导致1990年1月15日美国电话电报公司系统崩溃的黑客。 Attempts to program a computer to integrate gesture with speech began back in the 1970s at the Massachusetts Institute of Technology Architecture Machine Lab. 早在70年代，麻省理工学院建筑机械实验室就开始尝试在计算机中
3、将语言和手势集成在一起。,The application of electronic computers makes for a tremendous rise in labor productivity. 使用电子计算机可以大大提高劳动生产率。 Desertification is not a case of irreversible desert advance. 沙漠化并不意味着沙漠前进不可逆转。 With the click of a mouse, information from the other end of the globe will be transported to yo
4、ur computer screen at the dizzying speed of seven-and-a-half times around the earth per second. 只要一点鼠标，来自世界另一端的信息便会以每秒绕地球七周半的惊人速度传输到你的电脑屏幕上。 As we cross the threshold into the next century, human society is beginning its move from the industrial economy into the knowledge-based economy. 当我们步入下一世纪时，人
5、类社会也正由工业经济向知识经济转变。,Can artificial fibers be used as substitutes for natural fibers? 人造纤维能代替天然纤维吗？ Computers can provide analyses of every operation in a factory. 电子计算机能对工厂的每道工序进行分析。 We must place stress on the prevention of diseases. 我们应以预防疾病为主。,形容词转换成动词 Our river was dirty, our seas were polluted a
6、nd our natural environment was destroyed. 我们的河水被污染了，我们的海洋被污染了，我们的自然环境被破坏了。 The amount of work is dependent on the applied force and the distance the body is moved. 功的大小取决于所施加的力与物体所移动的距离。 Kerosene is not so volatile as gasoline. 煤油不象汽油那样容易挥发。 When is the next earthquake due? 下次地震将在什么时候发生？ They are su
7、re that theyll be able to build the factory in a short period of time. 他们肯定能在短期内建成那座工厂。,The amount of work is equal to the product of the force by the distance. 功的大小等于力和距离的乘积。 Copper wire is flexible. 铜线容易弯曲。 While the Chinese are eager to import modern medical technology from the West, increasing m
8、embers of Westerners are equally eager in adopting the traditional medical remedies of China. 现在中国人热衷于从西方国家进口现代化医疗技术，而越来越多的西方人则热衷于接受中医疗法。 The test piece shall be of length suitable for the apparatus being used. 试件的长度应与所使用的装置相适应。 Heat is a form of energy into which all other forms are convertible. 热是
9、能的一种形式，其他一切能的形式都能转化为热能。,副词转换成动词 The test was not over yet. 试验还没结束。 Open the valve to let air in. 打开阀门，让空气进入。 An exhibition of new products is on there. 那儿正在举办新产品展览会。 Motor vehicles, already the main source of city air pollution in rich countries, will increasingly pollute poor cities, too. 在发达国家，机动车
10、辆是空气污染的主要来源，在落后的城市，这种污染也将增加。 The experiment in chemistry was ten minutes behind. 这个化学试验延误了十分钟。,The radio is on. 收音机在广播。 The electric current flows through the circuit with the switch on. 如果开关接通，电流就流过线路。 The two bodies are so far apart that the attractive force between them is negligible. 这两个物体相距很远，它
11、们之间的吸引力可以忽略不计。 He took the machine apart yesterday. 他昨天把机器拆开了。 The force due to the motion of molecules tends to keep them apart. 由于分子运动而引起的力能使分子分离。,介词转换成动词 The volume of a gas becomes smaller when the pressure upon it is increased. 当作用在气体上的压力增大时，气体的体积就缩小。 The letter E is commonly used for electromo
12、tive force. 通常用字母 E 表示电动势。 No body at rest can be set in motion without a force being acted upon it. 没有力的作用，静止的物体不可能开始运动。 It is clear that numerical control is the operation of machine tools by numbers. 很显然，数控是指机床采用数字来操纵。 Many laboratories are developing medicines against AIDS. 许多实验室正在研制治疗爱滋病的药物。,At
13、omic power for ocean-going vessels is already a reality. 原子能动力用于远洋船只已经成为现实。 This is a kind of alloy with high strength. 这是一种具有高强度的合金。 The shaft turns about its axis. 轴围绕轴线转动。 So long as we have means of producing heat we can keep the steam engine at work. 只要能产生热，就能使蒸汽机做功。 Usually the working parts o
14、f the machines are made from carbon steels. 通常，机器的工作部件是用碳素钢制造的。,转换成汉语名词,动词转换成名词 Neutrons act differently from protons. 中子的作用不同于质子。 Gases differ from solids in that the former have greater compressibility than the latter. 气体和固体的区别在于前者比后者有更大的可压缩性。 The electronic computer is chiefly characterized by it
15、s accurate and rapid computations. 电子计算机的主要特点是计算准确而快速。 The Center is running a series of talks on the relationship between science and literature, in which poets and scientists discuss how scientific ideas over the past two centuries have influenced literature and social change. 这个中心正在举办关于科学与文学关系的系列
16、讨论会。与会的诗人和科学家们的讨论议题是：在过去两个多世纪里科学思想对文学和社会变革的影响。,Mercury weighs about thirteen times as much as water. 水银的重量约为水的十三倍。 The net and electronic commerce will foster a large number of free-fancers, and this will affect social structure in a big way. 网络和电子商业将会造就一大批自由职业者，从而将对社会结构产生深远的影响。 PCs gave the world a whole new way to work, play and communicate. 个人计算机使整个世界更新了工作、娱乐和通讯方式。 He aims to become a computer expert. 他的目标是当一名计算机专家。 In the life process, the animal works in the opposite way to the pla
