Mind your own business.

例句：

1. 1. Please don't bother me with your nonsense. Mind your own business.
   请不要用你的废话来烦我。
2. 2.I'm not interested in hearing about your problems. Mind your own business.
   我对听你的问题不感兴趣。
3. 3. He is too preoccupied with his own work to notice the others around him. Mind your own business.
   他太专注于自己的工作，以至于没有注意到周围的其他人。