listen in

动词 listen in:

1. listen quietly, without contributing to the conversation
2. listen without the speaker's knowledge
   同义词：eavesdrop

1. She loves listening in to other people's gossip.
   她爱偷听别人闲谈。
2. People used to listen in regularly before the days of television.
   在电视出现以前，人们经常收听广播。
3. She missed the broadcast, she forgot to listen in.
   她错过了那个节目的播出，她忘记收听了。