leave well alone
不要去动或改变已经很好的事物
口语·建议不干预
英文释义
to not interfere with or try to improve something that is already satisfactory
例句
The cake is perfect, so leave well alone and don't add more sugar.
典故来源
源自19世纪谚语，劝人不要干预已经满意的事物。