have somebody at one's back 让别人支持某人

【讲解】

back作名词时有“后背”的意思，at one's back在习语中转义为“支持' have somebody at one’s back意即“让某人支持某人’。

【对话】

A:Tom is very nervous. He is going to run for the chairman.

A:汤姆很紧张，他要竞选主席。

B:Let's have us at his back.

B:我们去支持他吧。

A:All right. We'll talk to him tonight.

A:好啊，今晚我们找他谈谈。