in the water
[俗]遇到麻烦；处于困境

He is in hot water. We should help him out of trouble.

他遇到麻烦了，我们应当帮他摆脱困境。

注解：
hot water意指热水；

to be in hot water系指在热水中，喻指处于水深火热之中、处于困境。

cover someone

[美俚]用枪瞄准某人；掩护某人

Hands up! We’ve got you covered!

举起手来!你已在我们的枪口下了!

They were in charge of covering retreat of the main forces.

他们负责掩护主力部队撤退。

注解：
cover意指掩护，瞄准；

to cover someone系指掩护某人或瞄准某人。