下课了。再见，同学们！

Class is over. Goodbye, class!

铃声响了三次，表示下课了。

The bell rang thrice to signal the end of the class.

学校的铃声响了，表示下课了。

The school bell rang to signal the end of the class.

老师通过关灯发信号表示下课了。

The teacher is signaling the end of the class by turning off the lights.

铃声表示下课了。

The ringing bell signify the end of the class.

我的小猪，你下课了没有？

I am the pig, you are not school?

下课了，孩子们可以踢足球了。

Classs being over, children could play football.

大多数孩子很开心因为下课了，

Most kids are happy. It's actually recess.

老师没布置作业就宣布下课了。

The teacher dismissed the class without any assignment.

妈妈，我要去吃，现在是下课了！

I am comimg! Wait for a minute!