turn his back on

• vt. 掉转脸去不理睬(拒绝帮助)

turn his back on的用法和样例：

例句

1. One should never turn his back on his home country.
   一个人永远也不能背弃自己的祖国。
2. He'll turn his back on me if I ask for money.
   我若向他借钱,他就会不理我。