N-UNCOUNT [oft with/inN]后见之明;事后聪明Hindsight is the ability to understand and realize something about an event after it has happened, although you did not understand or realize it at the time. 后见之明;事后聪明
With hindsight, we'd all do things differently.
有了事后的认识,我们都会以不同的方式行事。
Even with the benefit of hindsight, I doubt I would change anything if I had my time again.