He installed a detectaphone in the room.

他在房间里安装了一个侦听器。

They found a detectaphone hidden in the office.

他们发现了隐藏在办公室里的侦听器。

This detectaphone is very small and almost invisible.

这个侦听器非常小，几乎看不见。

He recorded all the conversations with a detectaphone.

他用侦听器录下了所有的谈话内容。

The police use a detectaphone to listen to the suspect's conversations.

警察使用侦听器来监听嫌疑人的对话。