She's responsible for the hirings and firings.

　　她負(fù)責(zé)雇用和解雇。

　　He was responsible for hiring and firing staff.

　　他負(fù)責(zé)招聘和解雇職員。

　　He was only partly responsible for the accident.

　　他對(duì)這次事故只負(fù)有部分責(zé)任。