You have to jump at the chance.

你必须要把握机会。

All things ought to be rolling at 4:30.

所有的事情都要在四点半开始做。

That is a rip-off.

那真是坑人。

Let’s grab something to eat.

我们随便找点吃的吧。

Hey, wise up.

咳，放聪明点。

You eat with that mouth?

你是用这张嘴吃饭的吗?

(当某人骂人骂得很难听时)