常用的动词有:

be combined in/into …

compose

constitute

form

make up

be composed of …

be made up of …

consist of …

comprise

contain 包含,包括

comprise 1.包含,包括 2.组成,构成

常用的名词有:

component 成分,组成

composition 组成,成分

constitution 构造,组成

constituent 成分,要素

content 内容,含量

formation 形成；构成

ingredient 成分，配料

make up 组成，构造

Steel is composed of iron and a number of other elements .

钢是由铁和若干种其他元素构成的。

Brass consists of copper and zinc .

黄铜由铜和锌构成。

The atmosphere comprises a number of gases .

大气由许多种气体构成。

Cast-iron is made up of about six different substances .

铸铁大约由 6 种不同的物质构成。

Sometimes two different types of machines are combined in a complex one .

有时两台不同的机器组成一台复杂的机器。

Ferrite and carbon make up mild steel .

铁素体和碳构成软钢。

Ferrite and carbon are the constituents of mild steel.

铁素体和碳是软钢的成分。

The composition of cast-iron is different for different purposes .

铸铁的成分随不同的用途而有所不同。

The alloy contains 5% nickel and 5% iron .

这合金含有 5%的镍和5%的铁。

The carbon content of wrought-iron is vary low .

熟铁的碳含量很低。

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