求翻译：众所周知，在上课或听报告期间睡觉是常见的事情。例如我们班，一到上课时间，大部分的学生都会趴台睡觉。其他班也是如此。也许是老师讲的课很无聊，也许是同学们无心学习。是什么意思？

As we all know , sleeping during class or listening to the report is a common thing.

It is well known that in the classroom or listening to reports during sleep is a common thing. For example, we have class, the class time, most of the students have only one bed. Other classes. Perhaps it is the teacher and the class is very boring, and it may be that students' motivation to study.

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