Definition
- C2
to possess a high level of practical skill and knowledge in a particular field or subject.
對某一項專業很內行
Before you start pitching the product, you’d better know your stuff.
在你開始推銷產品之前，你最好對產品瞭若指掌。
That chef really knows his stuff; every dish he makes is incredible.
那位廚師真的很專業；他做的每道菜都令人驚艷。
She is a very experienced lawyer and clearly knows her stuff when it comes to the law.
她是一位非常有經驗的律師，顯然對法律非常精通。