偷听的英文：
to eavesdrop
to monitor (secretly)
eavesdrop on sb

He ensconced himself in the closet in order to eavesdrop.
他藏在壁橱里，以便偷听。

Eavesdropping on the discussion,her parents
偷听讨论、偷听她父母谈话.

'She listened at the keyhole
“她在门缝里偷听。

She loves listening in to other people's gossip.
她爱偷听别人闲谈。

To listen to a conversation between others;eavesdrop.
偷听听别人的谈话;偷听

He hid behind the screen and overheard their conversation.
"他躲在帘子后面,偷听到他们的谈话。"

It means little advantage for eavesdropping
偷听一类的事情，它简直不起什么有利作用。

With his ear glued to the keyhole,ie listening hard to a conversation in another room
他耳朵紧贴在钥匙孔上(偷听室内谈话).

He listened at the keyhole to the conversation between his sister and her sweetheart.
他在门外偷听他姐姐和情人的谈话。

Dark shadows moved across the window as some eavesdroppers strolled to and fro outside
窗外移过几个黑影，有人在外边徘徊，偷听他们的谈话。

monitor operator
之声监听员

The teacher named John as monitor.
老师提名约翰当班长。

We have to reelect a monitor.
我们需要重选一名班长。

They secretly entered into collusion with the northern warlords.
他们喑中和北洋军阀勾结起来。

She was playing with fire by secretly borrowing office funds.
她暗中挪用公款简直是玩火。

To act together secretly to achieve a fraudulent, illegal, or deceitful purpose; conspire.
共谋，串通秘密地聚集在一起行动以达到叛逆、不合法的或欺骗目的；阴谋策划。