电话断线了。

The telephone lines went dead.

youdao

交谈时电话断线了，打电话的人有责任重新再打，即使是对方断线也应该如此。

If one is disconnected during a telephone conversation, it is the responsibility of the caller to call again, even if the line was broken at the other end.

youdao

还有一次我接了电话，但紧接着就断线了。

On another occasion I answered the phone and the line went dead.

《柯林斯英汉双解大词典》

我们电话打到一半就断线了。

We were cut off in the middle of our conversation.

《牛津词典》

电话打了一半，突然断线了。

In the middle of our telephone conversation we were suddenly cut off.

youdao

电话打了一半，突然断线了。

In the middle of our telephone conversation we were suddenly cut off.

youdao