口语，“马后炮”用英语怎么说？

qiufeng0299

[/table] [table=100%,#f2dec3]to be wise after the event

used to mean that it is easy to understand what you could have done to prevent something bad from happening after it has happened

事后聪明很容易;放马后炮很容易


In retrospect, we should have insisted on checking his calculations, but it's easy to be wise after the event. 
回想起来，我们本该坚持检查他的计算结果，不过事后聪明倒是容易。