hindsight /ˈhaɪndˌsaɪt/ noun Learner's definition of HINDSIGHT
[noncount]
: the knowledge and understanding that you have about an event only after it has happened事后诸葛亮;马后炮;事后聪明 -
It's easy for us to say that the war was wrong, but we have the advantage/benefit of hindsight.我们现在轻而易举就能指出那场战争是个错误,但这只是马后炮。
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In hindsight, it's clear that there were alternatives. = With hindsight, we clearly see that there were alternatives.事后想想,很明显当时有多种选择。
— see also twenty-twenty hindsight at twenty-twenty