have someone's number
US /hæv ˈsʌm.wʌnz ˈnʌm.bər/
UK /hæv ˈsʌm.wʌnz ˈnʌm.bər/
1.
摸清某人的底细, 知道某人的弱点
to know someone's true character or intentions, especially their weaknesses or secrets
:
•
I think I have his number; he's all talk and no action.
我想我摸清了他的底细；他光说不练。
•
The detective quickly had the suspect's number and knew he was lying.
侦探很快就摸清了嫌疑人的底细，知道他在撒谎。