hindsight

后见之明、事后的领悟

With hindsight, I should never have signed that contract.

事后才明白，我当初根本不该签那份合约。

事后诸葛、后知后觉贬义

It's easy to criticize the decision with the benefit of hindsight.

事后诸葛式地批评那个决定当然很容易。

回头看来、事后看来

In hindsight, moving to a smaller apartment was the right call.

回头看来，搬到比较小的公寓是正确的选择。