科英写作9.ppt

1、Scientific English Writing Section ,Ellipsis, . In compound sentences,电压的单位是伏特，电流的是安培。,Voltage is measured in volts and current in amperes.,地球吸引月球，月球也吸引地球,The earth attracts the moon and the moon the earth., A great many kinds of transistors exist, and many versions of each kind.,电子被注入P区，而空穴被注入N区。,E

2、lectrons are injected into the P region, and holes into the N region., In the table, a notation(标记) of infinite impedance indicates that the terminating impedance should be a minimum of 10 to 100 times the nominal(额定) impedance at the specific port, and zero that it should be well less than a tenth

3、the nominal impedance at the port and less than a hundredth if possible.,*省略发生在助动词和副词,而介词不可省,1. common pattern, . Ellipsis in adverbial clauses,When pure, water is a colorless liquid.,金属受热就会膨胀,Metals expand when heated.,一个常数无论有多大，决不能说成是无穷大,A constant number, however large, is never spoken of as infi

4、nite.,2. set patterns,如果有误差的话，应予以校正(correct).,Errors, if any, should be corrected.,若需要的话，可以把这个函数转换成时函数。,This equation, if necessary, can be converted to a time function., . Ellipsis after prep.,(Two prep. share an object),作者现在从事于图像处理和识别的教学与研究,(原错句) The author is now engaged in the teaching and resea

5、rching of image processing and recognition.,必须求出这个电阻上的电流和电压,It is necessary to find out the current through and the voltage across this resistor,*(改正后）The author is now engaged in the teaching of and the research on image processing and recognition.,Chapter 4 Measurements of, with, and in the Presen

6、ce of Noise.,加速度与外力成正比，并且方向相同, The acceleration is directly proportional to, and in the same direction as, the applied force.,我们想要求出提供给这个器件或由它消耗的平均功率。, It is desired to find out the average power provided for (supplied to) or dissipated by this device.,这位教授在研究和应用沃氏函数（Walsh Functions）方面起了积极的作用。,The p

7、rofessor play an important role in the research on and the application of Walsh Functions.,E-C Translation:,Section 9. Discontinuous Modification,. Pattern 1, 往往出现这样的问题，一个信号大于偏压（bias）,The problem often arises that a signal is greater than bias.,No chance exists for this device to be realized., 根本不存在

8、实现这种设备的可能。, Very wonderful changes in matter take place before our eyes every day to which we pay little attention., . Two modifiers after n., 这种新设备与原有的设备相比具有体积小、重量轻、结构简单的优点。,This new device has the advantages over those available of small size, light weight and simple structure.,It is necessary to

9、determine the effect on the device of changing the ambient temperature.,Quiz 2,让我们以原点为圆心作一个半径为r的圆。 没有证据表明能量能够被创造或被消灭。 把哪一点选作为原点是没有关系的。 功等于力乘以物体运动的距离。 我们必须搞清楚到底在什么条件下才能使用这一方法。 所谓电动势指的是当没有电流流动时电池两端的电位差。,Translate the following into English:,7. 对该设备的结构及性能作了初步的分析。 8. 某一设备的可用性取决于使用它的容易程度。 9. 有待于要做的是确定这个电阻上的电压。 10. 现在出现了这么个问题：该定律是否只适用 于金属导体。 11. 本文讨论了电子滤波器的工作情况和设计方法。 12. 这个合矢量是以其分量为两边的一个平行四边形的对角线。,II. Mistake correction Any student cannot solve this kind of special equation. The voltage of the resistor is measured with volts. The copper is a kind of matter and so d