下课的铃声响了。

The bell went for the end of the lesson.

《牛津词典》

终于下课的铃声响了，他们都冲了出去。

Finally the bell rings, and they escape.

youdao

铃声报知下课的时间。

A bell signals the end of a school period.

youdao

铃声报知下课的时间。

A bell signals the end of a school period.

youdao