eavesdropping

1.he was branded a prying sneak for eavesdropping on intimate conversation.

他被指责为刺探别人隐私的人，总是听别人的亲密谈话。

2.Suddenly the kids,who had been eavesdropping,flew into the room.

突然间，一直在听的孩子们飞进来。

3.She knew you were going to have a baby. She must have been eavesdropping on your conversation.

她知道你们想有个孩子。她准是总在听你们的谈话。