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。