you know better than that
你应该知道得更好
口语·责备或失望
英文释义
to express disbelief or disappointment in someone's actions, implying that they should have known or done something differently
例句
You left your bike unlocked again? You know better than that in this neighborhood.
典故来源
源自19世纪英语口语，强调对方本应有常识或判断力，却做了不该做的事。