三思而后行，这句话的意思是：凡事都要再三思考而后行动。它的英语翻译有几下8种：

1、Think twice before you do.

2、Make up your mind after thinking it over carefully.

3、Look before you leap. First think, then act.

4、Look before you leap.

5、Second thoughts are best.

6、Score twice before you cut once.

7、Think well before you act.

8、Measure thrice and cut once.