leave well enough alone

• vi. 不要去管它(听其自然)

例句

用作不及物动词 (vi.)

1. If I were you,I should leave the question alone.
   我要是你，我就不去管那个问题。
2. These machines can be temperamental and the secret is,once they're running smoothly,leave well alone.
   这些机器有时不太稳定，然而，其奥秘在于，一旦它们运转平稳以后就不用去管了。