第4节 翻译练习3

Cartography is the science of making maps.

Many elements in nature are found to be mixtures of different isotopes.

制图学是研究绘制地图的科学。（增译）

人们发现，自然界里许多元素，都是各种不同的同位素的混合物。（增译）

The two units used most frequently in electricity are ampere and volt: this is the unit of voltage and that of current.

That like charges repel but opposite charges attract is one of the fundamental laws of electricity. 电学上最常用的两个单位是安培和伏特：后者是电压的单位，前者是电流的单位。（增译） 同性电荷相斥，异性电荷相吸是电学的一个基本规律。（省译）

第4节 翻译练习4

Almost any insulated body processes to some extent the ability to retain for a time an electric charge.

The angular contact bearing provides a greater thrust capacity.

The properties of the weld can be altered by varying the grain orientation.

几乎任何一种绝缘体都多少具有保留电荷一段时间的能力。

向心推力轴承有较大的轴向承载能力。

通过改变晶粒的方向可以改变焊缝的性能。

2.1 词义的选择

第1节 翻译练习1

The spindle rotates simultaneously round two axes at right angles to each other.

The earth isn’t completely round; it is slightly flattened at the poles.

In each round of operation the particle picks up energy from the oscillating electric field. 锭子同时绕两个互相垂直的轴旋转。（介词）

粒子每运转一周都从振荡电场获取新的能量。（名词）

地球并非完全是圆的，它的两极略扁平。（形容词）

An electron is an extremely small corpuscle with negative charge which rounds about the nucleus of an atom.

Her waist measures forty inches round.

电子是绕原子核转动且带有负电荷的极其微小的粒子。（动词）

她腰围40英寸。（副词）

第1节 翻译练习2

Rate of penetration was found to be proportional to the net pressure applied by the tool.

Scientists are constantly striving to find fast and convenient way of obtaining quantitative data. To find the area of a square or oblong, you merely multiply its length by its width.

Certain isotopes are not found in nature.

人们发现钻孔速度与工具所受的净压力成正比。

求一正方形或长方形的面积，你只需将其长度乘以宽度。

科学家们总是力求找到快速而简便的方法获得定量数据。

有些同位素在自然界中并不存在。

New fibers find expanding applications in engineering and industry.

Kangaroos are found in Australia.

This plant is found in the sea near the mouth of rivers.

Microcomputers have found their application in the production of genius sensors.