不可救药

He has an incurable and widespread nepotism.

他有可救药，到处蔓延裙带主义。

They are trying to cure him of his drug addiction but he is beyond hope.

他想治愈他毒瘾, 但是他已经可救药了。

My children are hopelessly addicted to television.

我几个孩子都成了电视迷,简直是可救药了。