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1·These hills were formed by glaciation.

这些山丘是冰川作用形成的。《牛津词典》

2·The benzene vaporized and formed a huge cloud of gas.

苯蒸发形成了一大团气体。《柯林斯英汉双解大词典》

3·The stars must have formed 10 to 15 billion years ago.

这些恒星一定形成于100亿至150亿年前。《柯林斯英汉双解大词典》

4·A spectrum is formed by a ray of light passing through a prism.

一束光通过棱镜就会形成光谱。《牛津词典》

5·The poor suburbs traditionally formed the bedrock of the party's support.

贫穷的郊区在传统上构成了支持该党的牢固基础。《牛津词典》

6·The moral characters of men are formed not by heredity but by environment.

人的品德不是由遗传而是由环境形成的。《柯林斯英汉双解大词典》

7·Slabs of rock had slipped sideways in the remote past and formed this hole.

在遥远的过去，大块的岩石向旁边滑落，形成了这个洞。《柯林斯英汉双解大词典》

8·Puddles had formed in the dips.

低洼处形成了一个个水坑。《牛津词典》

9·The teams formed up into lines.

各队已整好了队列。《牛津词典》

10·The singer re-formed his band.

这名歌手对他的乐队进行了重组。《柯林斯英汉双解大词典》

构成

1·The material of which the organism is formed changes continuously.

构成有机体的物质是不断变化的。

2·The result is that sandstone, for example, can be as porous as the loose sand from which it was formed.

因此，举个例子，沙岩可以和构成它的疏松的沙粒一样具有多孔渗水的特点。

3·These expressions are formed using functions, which are combined to get the results we may be looking for.

这些表达式是使用函数构成的，结合这些函数来得到我们可能要查找的结果。

4·Together with the kilogram, initially the mass of a decaliter of distilled water, it formed the basis of the metric system.

它和千克（10升蒸馏水的重量）一起构成了公制计量的基本单位。

5·Often they kill and die not in order to preserve their own lives or those of the people they love, but for the sake of an idea — the conception they have formed of themselves.

经常他们杀人或者被人杀害不是因为要保存他们自己的生命或者他们热爱的人的生命，而是为了某个观念——某个构成他们自我的观念。

(1)be formed with由…组成

(1)well formed完整的，形成良好的

(1)formed steel带钢

(1)be formed from由…构成；由…做成