科技英语翻译课后题答案

The power plant is the heart of a ship. 动力装置是船舶的心脏。

The power unit for driving the machines is a 50-hp induction motor.

驱动这些机器的动力装置是一台50马力的感应电动机。

Semiconductor devices, called transistors, are replacing tubes in many applications.

半导体装置也称为晶体管,在许多场合替代电子管。

Cramped conditions means that passengers’legs cannot move around freely.

空间狭窄,旅客的两腿就不能自由活动。

All bodies are known to possess weight and occupy space. 我们知道，所有的物体都有重量并占据空间。The removal of minerals from water is called softening. 去除水中的矿物质叫做软化。

A typical foliage leaf of a plant belonging to the dicotyledons is composed of two principal parts: blade and petiole.

双子叶植物典型的营养叶由两个主要部分组成叶片和叶柄。

Einstein’s relativity theory is the only one which can explain such phenomena.

爱因斯坦的相对论是能解释这种现象的唯一理论。

All four (outer planets) probably have cores of metals, silicates, and water.

这四颗外层行星的内核可能都由金属、硅酸盐和水构成。

The designer must have access to stock lists of the materials he employs.

设计师必须备有所使用材料的储备表。

Part adjustment and repair must be performed on regular basis if an acceptable printed product is to be the end product.

要使印刷品的质量达到要求部件调试及修理就必须定期进行。

The most important of the factors affecting plant growth is that it requires the supply of water.

植物生长的各因素中最重要的是水的供应。

The doctor analyzed the blood sample for anemia. 医生对血样作了分析,看是不是贫血症。

The apparent change in size of the sun is caused by dust in the air near the horizon.

太阳的大小看起来有变化,这是由于靠近地平线的空气中有尘粒而引起的。

These fragments of rock and iron range from thousand kilometers in diameter to less than one.

这些石块和铁块的碎片大小不等,大的直径有1000公里,小的不到1公里。

Manufacturing processes may be classified as unit production with small quantities being made and mass production with large numbers of identical parts being produced.

制造过程可以分为单件生产和大量生产。前者指的是生产少量的零件,后者则是指生产大量相同的零件。

Cartography is the science of making maps.制图学是研究绘制地图的科学。

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

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。

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

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。

That like charges repel but opposite charges attract is one of the fundamental laws of electricity.

同性电荷相斥异性电荷相吸是电学的一个基本规律。

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

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。

The angular contact bearing provides a greater thrust capacity.

向心推力轴承有较大的轴向承载能力。

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

通过改变晶粒的方向可以改变焊缝的性

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

锭子同时绕两个互相垂直的轴旋转。

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