►含义：The proverb means it is easy to understand something after it has already happened. The expression is usually used to respond to an admonishment that the person should have known something would happen, or that the person made a bad decision.这个谚语意思是“事情发生后，人们再看它就很清楚了”，常常用来回应“指责某人本应该如何如何或者不应该做某种错误决定”的训戒。 ►例句It’s pointless to blame anybody now. Hindsight is 20-20!现在责怪任何人都无济于事。马后炮！ ►对话 A:You shouldn't have made such a decision!你本不应做这个决定的。B: Hindsight is 20/20.事后诸葛亮。 ►额外收获： 1.respond to：回应2.admonishment: n.训戒3.should(n’t) have done：本（不）应该如何如何4.pointless：adj.没有意义的 ►今日作业： 1. 请记牢今天的短语。 2. 请背诵上面的例句。3. 请找一个小伙伴（或者跟自己）演练上面这则口语对话。4. 请任用上面“意外收获”中的一个短语或单词进行造句，可以分享在下面"打卡日记"中。