be someone's department
US /biː ˈsʌm.wʌnz dɪˈpɑːrt.mənt/
UK /biː ˈsʌm.wʌnz dɪˈpɑːrt.mənt/
1.
是某人的职责, 是某人的专业领域
to be someone's responsibility or area of expertise
:
•
I can't help you with that; it's not my department.
我帮不了你；那不是我的职责范围。
•
Handling customer complaints is her department.
处理客户投诉是她的职责。