Why bother to write? We'll see him tomorrow.

还费事写信干什么？我们明天就见到他了。

Why bother asking if you're not really interested?

如果你不是真的感兴趣，干吗费口舌打听呢？

Nothing I do makes any difference anyway, so why bother?

不管我做什么都没有区别，那为什么还要费心去做呢？

If you are doing something that you hate and you are not happy, why bother?

如果你正在做一件你讨厌的事情，而且你并不快乐，何必呢？

Why bother like this?

何苦乃尔？