求翻译：许多学生每天的学习相当繁忙， 但是放学回到家，还要熬夜完成作业，这是他们的睡觉时间大大减少，所以使他们第二天上课没有精神是什么意思？

The learning of many students are quite busy, but came home from school, but also to stay up all night to finish the job, which is greatly reduced their sleep time, so as to enable them to class the next day without spiritual

Many of the students are very busy every day of the study, but returned home after school, but also to finish the job, and that night they sleep is greatly reduced, so that they do not have the 2-day school spirit

Many student's daily studies are quite busy, but is on vacation from school gets the home, but also must stay up late to complete the work, this is they sleeps the time to reduce greatly, therefore causes them second days to attend class does not have the spirit

Many students study every day is busy, but came home from school, but also staying up late to complete the job, which is to substantially reduce their sleep time, so making them in class the next day without spirit

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