listen in
phrasal verblisten in (on/to something)
- to listen to a conversation that you are not supposed to hear
窃听;偷听;监听 - You shouldn't listen in on other people's conversations.
你不应该偷听别人的谈话。 - They did not know that the police were secretly listening in.
他们不知道警方在秘密监听。
- You shouldn't listen in on other people's conversations.
- to listen to a radio broadcast
Topics TV, radio and newsb1收听(无线电广播)