Think twice before doing anything rash.
不要草率行事，要三思而行。
Think twice before doing anything
三思而行。
She'd better shut her mouth and from now on think twice before saying stupid things.
她最好閉上嘴巴，而且今后在說出蠢話之前先過過腦子。
You can list them out and think them over.
你可以把它們列出來仔細考慮。
I'd better think over what he said.
我最好仔細考慮他說過的話。
Please think over the meaning of every single word.
請仔細考慮每一個詞的意思。
Let's think over the matter first.
首先，對這件事仔細考慮。