listen in on (lìsēn yīn ōn)

Phrasal-verb Listening

含义

to secretly hear someone’s conversation

偷偷听某人的谈话 (tōutōu tīng mǒu rén de tánhuà)

例句

"He was caught listening in on their private discussion."

"他被抓到偷偷听他们的私人讨论。" (tā bèi zhuā dào **listening in on** tāmen de sīrén tǎolùn)