2. as pre-modifiers ●该电阻上的电压为总电压的2/5。 The voltage across the resistor is two fifths (of) the total voltage.
3.
representation of the increase in the number of times ●这个参数比那个大三倍。 This parameter is four times as great as / greater than that one.


3.f(x+h)-f(x)这一表达式(expression) 经常用于微积分(calculus)的学习。 3. The expression f(x+h)-f(x) is frequently used in the study of calculus一个未知数 (unknown)的线性方程(linear equation)。

4. An equation which can be written in the following form is known as a linear equation with one unknown.
5.在计算机中，趋势是以尽可能高的时
钟速率(clock rate)工作。

5. In a computer, the tendency is to operate at as high a clock rate as possible.

5.在计算机中，趋势是以尽可能高
的时钟速率(clock rate)工作。 6.该电容器(capacitor)上的电 压(voltage)为零点零几伏 (volt)。 7.十年前该厂的产量(output)仅 为现在的五分之一。 8.这两个数值之差(difference) 为万分之十三。


●略微计算一下，将会使你相信这的
确是真的。 A short calculation will convince you that this is indeed true.
II.
Numeral 1.The representation of a fraction

●流过该电路的电流为零点零几安培。
●为此，对计算机必须有良好的了解。 To this end /For this purpose, a good understanding of computer science is necessary. (It is necessary to have a good …) ●理解二进制数系的关键是要熟悉2的各次 幂。 Basic to understanding the binary number system is a familiarity with the powers of 2.



13.电(electricity)可以容易地被 转变成其它形式的能量。 14.1831年美国人约瑟夫· 亨利 (Joseph Henry)发现了电磁感 应(electromagnetic induction)现象。 15.接收机(receiver)是由几个单 元组成的。
II. 改正下列句中的错误 1. The new designed instrument is in good quality. 2. This engine needs (requires, wants) being cleaned. 3. This running machine will stop of itself in one minute or two. 4. In this case, the input does not fall; the output does not fall, too.
The
current flowing through the circuit is a few hundredths of an ampere. ●这两个参数之差为百万分之九。 The difference between the two parameters is 9 parts in a million / per million / in 106.
9.锡(tin)的熔点(melting
11.必须弄清(find)解(solve)这个 方程(equation)需要多长时间。 11. It is necessary to find how long (a time) it takes [或: is required; is needed] to solve this equation. 12.这根导线(wire)比那根粗 (thick)3倍。 12. This wire is four times thicker than that one.
Practice
I. C-E translation 1.输入信号太大会引起非线性失真 (nonlinear distortion)。 2.利用斜率(slope)的定义，我们能导出 (derive)表示直线的方程。 3.f(x+h)-f(x)这一表达式(expression) 经常用于微积分(calculus)的学习。 4.能写成以下形式的方程称为含有一个未知 数(unknown)的线性方程(linear equation)。


(2) Specific uses of indefinite articles
作比较（分析，研究）:



make a comparison (an analysis, a study) ●本文对其性能作了初步的分析。 An initial analysis of the performance has been made in this paper. This paper has made an initial analysis of the performance.




9.锡(tin)的熔点(melting point) 没有铅(lead)高。(要求使用 “have as … as”句型) 10.这个平均速度(average velocity)是末速度(final velocity)的一半。 11.必须弄清(find)解(solve)这个 方程(equation)需要多长的时间。 12.这根导线(wire)比那根粗 (thick)3倍。



参考译文 I. C-E translation 1.输入信号太大会引起非线性失真 (nonlinear distortion)。 1. A nonlinear distortion can be caused by too large an input signal. Too large an input signal may cause/give rise to/result in… 2.利用斜率(slope)的定义，我们能导出(derive) 表示直线的方程。 2. (By)Using the definition of slope, we can derive the equation which represents a straight line.
point)没 有铅(lead)高。(要求使用“have as … as”句型) 9. Tin does not have as high a melting point as lead (does). 10.这个平均速度(average velocity) 是末速度(final velocity)的一半。 10. This average velocity is half the final velocity.

13.电(electricity)可以容易地被转变成其它 形式的能量。 13. Electricity can be easily converted into other forms of energy. 14.1831年美国人约瑟夫· 亨利(Joseph Henry)发现了电磁感应 (electromagnetic induction)现象。 14. In 1831, Joseph Henry, an American, discovered the phenomenon of electromagnetic induction.





2. Specific rules （1）Special positions ●该发生器产生一个太大的信号以致 于这个晶体管无法处理。（ S—V— O pattern） This generator produces so large a signal that the transistor can not handle it. (too large a signal for the transistor to handle)
Section 1 Vocabulary
I. Article 1.The general rules ●如果在电路的两端加上电压的话，在电 路中就会有电流流动。 If a voltage is applied across a circuit, a current will flow/result in the circuit. ●钨就是用在电灯里的金属。 Tungsten is the very metal used in electric lamps (an electric lamp).

15.接收机(receiver)是由几个单
元组成的。 15. A receiver consists of several units [或：parts].
6.该电容器(capacitor)上的电压
(voltage)为零点零几伏(volt)。

6. The voltage across this capacitor is a few hundredths of a volt.