The listening device was concealed in a pen. 窃听装置藏在了笔里。
I tried to conceal my surprise when she told me her age. 她告诉我她的年龄时,我尽力掩饰自己的惊讶。
It was said that the police concealed vital evidence. 据说警方隐瞒了关键的证据。
Is there something you're concealing from me? 你是不是有事瞒着我?
Synonym: hide