释义：

think twice 三思，慎重考虑

字面含义为“想两次”，用来表达“慎重考虑”。最常用的结构为 think twice before (在做某事前慎重考虑一番）。与短语 think over 具有相近的含义。

例句：

You should think twice before having kids.
你要在生孩子前好好考虑考虑。
I'm going to think twice before I try this.
我要在开始前好好考虑考虑。
There's always something bugging you. Think hard.
总会有一些事情让你烦恼，好好想想。
Let me have time to think it over.
让我找个时间好好想想。

对话：

A: Think twice before you choose what to study.
在你决定学什么之前，好好考虑考虑。
B: Yeah, you need to get a good education.
恩，你得接受良好的教育。