1. soon to be 即将成为

例句：The compatibility of boy and girl (soon to be husband and wife) was of little account to her; neither was the potential for mutual affection between them.

她很少会考虑男孩和女孩（很快将成为夫妻）是否相配，或他们是否可能互相喜欢。

2. throw at 投向，掷向

例句：But others filled bottles with petrol to throw at the police lines.

另外一些人则在瓶子里灌上汽油投向警察的警戒线。

3. serve as 担任…，充当…；起…的作用

例句：The solutions below are descriptions of how these issues have been recurrently solved and may serve as a pattern to help you on your next project.

下面的解决方案描述了这些问题是如何循环地解决的，并且可以作为模式用于下一个项目，以助您一臂之力。

4. bump up against 碰到 遇到（困难）

He ran to the rear only to bump up against a burning German tank.

他跌跌撞撞跑过一辆燃烧中的德军坦克，向后方窜去

5.be exposed to

例句：This liquid is not to be exposed to air, for it will soon evaporate.

这种夜体不可暴露在空气中，因为它会很快蒸发掉。