20 20 hindsight 成语
Hindsight is twenty-twenty
After something has gone wrong, it is easy to look back and make criticisms.
twenty-twenty hindsight
twenty-twenty hindsight
Knowledge after the fact, as in With twenty-twenty hindsight, I wouldn't have bought these tickets. This idiom uses twenty-twenty in the optometrist's sense, that is, “indicating normal vision,” and hindsight in the sense of “looking back” or “reconsidering.” [First half of 1900s]