do a service to

• 效劳

do a service to的用法和样例：

例句

1. He has a whole stable of informers working for him.
   他有一群告密者为他效劳。
2. I am always ready to work for you.
   我愿意随时为你效劳。
3. This new discovery will contribute to all humanity.
   这个新发现将对全人类作出贡献。
4. The Queen requited his services with a knighthood.
   女王为表彰他的贡献封他为爵士。