1.即便只有一个负面的意见，你也要三思而后行。

Even if there’s only a negative opinion, you should think twice before you do.

2.他非常细心，办事总是三思而后行。

He is very careful, and always looks before he leaps.

3.总而言之，做人做事，三思而后行，就可以避免很多不必要的烦恼。

In short, no matter for being a human or handling affairs, we should first think, then act and it can avoid a lot of unnecessary troubles for us.

4.但无论如何，做事前，还是请三思而后行吧！

However, before doing something, still please look before you leap!