背后有人 meaning in Chinese

someone else is behind (him).; have sb. else behind (him)

That asshole worked behind his boss ' back
这浑蛋背后有人罩
About to pass through the doorway , feeling one behind , he stood aside
正要走出门口的当儿，他觉出背后有人，便往旁边一闪。
One day , walking in the street , wu sung heard someone calling him from behind , saying : " now , you have become a police officer
武松这天正在街上走，忽听背后有人叫： “兄弟，你做了都头，怎么不看顾我些？ ”