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1、 练习练习 1II 冠词冠词1.Dr. Emmet graduated from Harvard University in 2001.（Emmet 博士 2001 年毕业于哈弗大学）2.Professor Li earned his Ph.D. degree in mechanical engineering from the Xian University of Technology in 1988.（李教授 1998 年在西安理工大学获得机械工程博士学位）3.Now we shall turn to the discussion of local area networks.（现在我们转
2、向（turn to）讨论一下局域网）4.The Bainbridge mass spectrometer is as important an instrument as the optical spectrometer.（质谱仪是与光谱仪一样重要的仪器）5.How long a time 或 How much time is required to this experiment?（做这个实验需要多长时间？）6.An increase in pressure always causes a decrease in volume.（压力的增加总会引起体积的减少）7.Fig. (2-5) sho
3、ws what is expressed by Eq. (2-2).（图（2-5）画出了式（2-2）所表示的情况）8.The unit of inductance is the henry.（电感的单位是亨利）III、改错1.The UASMA protocol employs a unique frame structure.（UASMA 协议采用了独特的帧结构）2.Finally, a broad stepped impedance transformer is designed by this method.（最后，用这种方法设计了宽带阶梯阻抗变换器）3.Dynamic analysis
4、 and evaluation of the security of a proactive secret sharing system（先应秘密共享系统安全性的动态分析和评估）4.The approach can be applied to the one-dimensional potential barrier with an arbitrary profile.（该方法适用于任意形状的一维势垒）5.We propose a numerical method based on Newtons iterative method.（我们提出了一种基于牛顿地带发的数值方法）练习练习 21. T
5、his circuit consists of a battery, an inductor and a capacitor.（该电路是由一个电池、一个电感器和一个电容器组成）2. Compute the electric fields at points a, b, and c.（试计算在 a、b、c 三点处的电场。）3. This satellite is used for communications between the United States and Great Britain, France and Italy.（这颗卫星用于美国与英国、法国、意大利之间的通讯）4. We a
6、ssume that the antenna is vertical and that its loss is zero.（我们假设该天线是垂直的，并且其损耗为 0）5. Chapters 6, 7, and 8 deal with transmission lines.（第 6、7、8 章论述传输线）II、将下列句子译成英语，注意正确使用数词数词1. Its error is six parts in 1012.（其误差为千亿分之六）2. This computer stores four times more information than that one (does).（这台计算机存
7、储的信息比那台多 3 倍）3. The demand for this kind of equipment in the near future will be 20 times what it is.（不久的将来对这种设备的需求量是现在的 20 倍）4. The voltage across this component is a few tenths of a volt.（这个元件上的电压为零点几伏特）5. Now its internal pressure is one sixteenth what it was.（现在其内部压力是原来的十六分之一）III、改错1. This objec
8、t is over five times heavier than that one is.（这个物体比那个物体重 4倍多）2. Unless otherwise stated, it is assumed that silicon transistors are used and that ICBO can be neglected.（除非另有说明，我们假设使用的是硅管、ICBO可以忽略不计）3. This circuit has the advantages of simple structure and easy adjustment.（这个电路的优点是结构简单、容易调整）4. Figs
9、. 1, 2, and 3 show this process in detail.（图 1、2、3 详细地画出了这个过程）5. For further information, consult references 3, 5, 9.（对于进一步信息，参见文献3、5、9）练习练习 3I、将下列句子译成英语，注意正确使用介词介词1. This new type of computer has many advantages over the general type.（这种新型计算机与普通计算机相比有许多优点）2. It is not difficult to solve this differ
10、ential equation for the unknown quantity.（解这个微分方程把未知量求出来并不难）3. Of these five new chapters, the first one deals with the basic principles of negative feedback.（在这新的五章中，第一章论述负反馈的基本原理）4. At this point/time, current differs in phase from voltage by 90o.（这时，电流与电压相位（phase）相差 90）5. By analyzing By the anal
11、ysis of the parameters of the instrument, we can understand its performance.（通过分析该仪器的参数，我们就能了解它的性能）6. We will find out its average velocity over this distance.（我们要求出它在这一距离上的平均速度）7. The science of electronics is too important in the world today. （电子学这门科学在现今世界太重要了）8. They solved this problem with grea
12、t difficulty.（他们极为困难的解出了这道题）II、画线部分用介词短语介词短语表示1. For x1, there is no solution to this equation this equation has no solution.2. Upon On substituting substitution of these values into in the equation, we obtained the following expression.（在把这些代数带入该方程后，我们得到了下面的表达式）3. This circuit is similar in operati
13、on to that of Fig. 1-10.（这个电路的工作情况类似于图 1-10 的电路）4. This computer is very good in performance.（这台计算机的性能很好）5. These waves travel only in one direction.（这些波只向一个方向传播）III、 改错1. This paper presents a new method for the recognition of radar targets.（本文提出了雷达目标的一种新的识别方法）2. The influence of the moving state o
14、f the target on the tracking accuracy of the EKF is great.（目标的运动状态对 EKF 的跟踪精度影响是非常大的）3. Another comsat was launched on the morning of the 8th of October.（在 10 月 8 日早上又发射了一颗通信卫星）4. Voltage is measured in volts.（电压时用伏特来度量的）5. They will leave for Beijing to attend an international conference on mobile
15、communication.（他们将赴北京参加移动通信国际会议）练习练习 41. The force acts perpendicular to the surface of the table.（该力垂直于桌面作用）2. The three coefficients here remains to be determined.（这里的三个系数有待于确定）3. The two equations below will be often (frequently) used in later chapters/in the chapters which follow.（下面的两个式子在后面几章将会
16、经常用到）4. Here we use two metal balls 10 cm apart.（这里我们使用相距 10 厘米的两个金属球）5. The output remains/stays constant/unchanged/fixed/unaltered/the same. （输出保持不变）6. All the textbooks available discuss this problem.（现有的教科书均讨论了这一问题）7. Accurate in operation and high in speed, computers have found wide applications.（计算机由于运算准确、速度快而得到了广泛的应用）8. The answer to this problem looks correct.（这个题的答案看起来是正确的）9. Two parallel wires a distance (of)apart carry the current i.（两根
