•The listening device was concealed in a pen.窃听装置藏在笔里。

•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？