a benefactor of mankind

• 人类的恩人

a benefactor of mankind的用法和样例：

例句

1. He did, however, discover his anonymous benefactor.
   不过,他终于找到了那个匿名的恩人。
2. But the lad could not think of killing his kind benefactor.
   但是老三不想杀死自己的恩人。