求翻译：我们不能上课迟到，不能上课吃东西，在上课期间不可以讲笑话，在课堂里不能打架，下了课不能在走廊上奔跑。不能在课堂上听音乐，走楼梯靠右走。是什么意思？

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We cannot attend class are late, cannot attend class eats the thing, in attends class the period may not tell the joke, cannot fight in the classroom, finished class cannot run on the corridor.Cannot listen to music in the classroom, walks the staircase to depend on walks right.

We can't be late for class, you cannot eat in class, not a joke during the class, in the classroom cannot fight, after class does not run on the corridor. Can't listen to music in the classroom, take the stairs on the right.

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