机械工程英语第二版翻译unit5

第一单元

? Types of Materials 材料的类型

Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materials.

材料可以按多种方法分类。科学家常根据状态将材料分为：固体、液体或气体。他们也把材料分为有机材料(曾经有生命的)和无机材料(从未有生命的)。

For industrial purposes, materials are divided into engineering materials or nonengineering materials. Engineering materials are those used in manufacture and become parts of products.

就工业效用而言，材料被分为工程材料和非工程材料。那些用于加工制

? Types Materials

材料的类型

Materials may be grouped in several ways. Scientists often classify materials by their state: solid, liquid, or gas. They also separate them into organic (once living) and inorganic (never living) materials.

材料可以按多种方法分类。科学家常根据状态将材料分为：固体、液体或气体。他们也把材料分为有机材料(曾经有生命的)和无机材料(从未有生命的)。

For industrial purposes, materials are divided into engineering materials or nonengineering materials. Engineering materials are those used in manufacture and become parts of products.

就工业效用而言，

1.With low-power machinery or vehicles the operator can usually apply sufficient force through a simple mechanical linkage from the pedle or handle to the stationary part of the brake. In many cases, however, this force must be multiplied by using an elaborate braking system.（P5） 用低能机器或传力工具，操作者通过向踏板或把手的一个简单机械连接构件作用足够的力量到车闸固定的部分。大多数情况，然而，用一个详细（复杂）的车闸系统使这个力量成倍增加。

2. The fundamental principle involved is the use of compressed air acting through a piston in a cylinder to set block brakes on the wheels. The action is simultaneou

1.With low-power machinery or vehicles the operator can usually apply sufficient force through a simple mechanical linkage from the pedle or handle to the stationary part of the brake. In many cases, however, this force must be multiplied by using an elaborate braking system.（P5） 用低能机器或传力工具，操作者通过向踏板或把手的一个简单机械连接构件作用足够的力量到车闸固定的部分。大多数情况，然而，用一个详细（复杂）的车闸系统使这个力量成倍增加。

2. The fundamental principle involved is the use of compressed air acting through a piston in a cylinder to set block brakes on the wheels. The action is simultaneo

Unit 5 True Height

The greater the obstacle, the more glory in overcoming it.

—— Moliere

障碍越是巨大，逾越它也就越感到自豪。——莫里哀 When it is dark enough, you can see the stars.

—— Charles A. Beard

只有天空漆黑时，你才能看到星星。

—— 查尔斯 ·A·比尔德 Detailed Reading

Ⅰ. Difficult Sentences

1. (LL. 8~9) It combines the grace of a gymnast with the strength of a body builder.

Translate the sentence into Chinese.

(=它融合了体操运动员的优雅与健美运动员的力量。)

2. (LL. 16~20) He would be running sown a country road. As he raced between golden wheat

fields, he would…

Why is Michael’

专业英语翻译

UNIT 1

材料的类型

材料可以按多种方法分类。科学家常根据状态将材料分为：固体、液体或气体。他们也把材料分为有机材料(曾经有生命的)和无机材料(从未有生命的)。

就工业效用而言，材料被分为工程材料和非工程材料。那些用于加工制造并成为产品组成部分的就是工程材料。 非工程材料则是化学品、燃料、润滑剂以及其它用于加工制造过程但不成为产品组成部分的材料。

工程材料还能进一步细分为：①金属材料②陶瓷材料③复合材料 ④聚合材料，等等。

金属和金属合金

金属就是通常具有良好导电性和导热性的元素。许多金属具有高强度、高硬度以及良好的延展性。

某些金属能被磁化，例如铁、钴和镍。在极低的温度下，某些金属和金属化合物能转变成超导体。

合金与纯金属的区别是什么？纯金属是在元素周期表中占据特定位置的元素。例如电线中的铜和制造烹饪箔及饮料罐的铝。

合金包含不止一种金属元素。合金的性质能通过改变其中存在的元素而改变。金属合金的例子有：不锈钢是一种铁、镍、铬的合金，以及金饰品通常含有金镍合金。

为什么要使用金属和合金？许多金属和合金具有高密度，因此被用在需要较高质量体积比的场合。

某些金属合金，例如铝基合金，其密度低，可用于航空航天以节约燃料。许多合金还具有高断裂韧性，这意味着它

Unit 6 Injection Molding

Injection molding (Fig 6.1) is the predominant process for fabrication of thermoplastics into finished forms, and is increasingly being used for thermosetting plastics, fiber-filled composites, and elastomers.

It is the process of choice for tremendous variety of parts ranging in weight from 5g to 85g. It is estimated that 25% of all thermoplastics molded. If newer modification, such as reaction injection molding, and the greatly increased rate of adoption of plastics as substitutes for metals are

Lesson 1 Who Are you and what are you doing here

Welcome and congratulations: Getting to the first day of college is a major achievement. You’re to be commended, and not just you, but the parents, grandparents, uncles, and aunts who helped get you here.

It’s been said that raising a child effectively takes a village: Well, as you may have noticed, our American village is not in very good shape. We’ve got guns, drugs, two wars, fanatical religions, a slime-based popular culture, and some politicians who—a little restraint h

Unit 5 Athletes

Athletes Should Be Role Models

I love Charles Barkley like a brother, and except for the times when we're hanging and pushing each other under the boards in games between my team, the Utah Jazz, and his, the Phoenix Suns, we're great friends. We don't necessarily like the same things: Charles loves golf so much he would play at halftime if he could, but I think a golf course is a waste of good pasture-land. One of the reasons we get along so well, though, is that we both say what's on our minds without worryin

英语专业

Let me tell you one of the earliest disasters in my career as a teacher. It was January of 1940

Kansas City. Part of the student body was a beanpole with hair on top who came into my class, sat down, folded his arms, and looked at me as if to say "All right, teach me something." Two weeks later we started Hamlet. Three weeks later he came into my office with his hands on his hips. "Look," he said, "I came here to be a pharmacist. Why do I have to read this stuff" And not having a book of his own to point to, he pointed t