be somebody's departmentspokenRESPONSIBLE if something is someone’s department, they are responsible for it or know a lot about it 是某人的职责;是某人的专长 I’ll see what I can do, but it’s not really my department. 我看看能做什么,不过这其实不属于我的职责范围。
be somebody’s department• Don't ask me - cooking is John's department.
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