There wasn't even a convenient place for students to assemble between classes.

甚至没有一个学生们课间集合的方便的地方。

In addition, you can define the relations between classes.

除此之外，你可以定义类之间的关系。

Between classes it is high cohesion and low coupling.

类与类之间具有高内聚，低耦合的特点。

We usually chat together for a while between classes.

我们在课余往往闲谈一会儿。

Between classes, ten minutes are allowed for play and rest.

课间有十分钟可用来玩耍和休息。