课堂上我精神很好，但是我有的同学有时在课堂上睡觉。
I am often spirit in the class, but some of my classmates sometime would sleep in the class.
孩子们应该在每天晚上九点之前上床睡觉，否则他们在课堂上就会犯困。
Children should go to bed before nine every night, or they will be sleepy in class.
有时候，体育不过是找到一种健康方式让多动的孩子筋疲力尽，好让他们能安静地坐在课堂上，或是在该睡觉的钟点上床睡觉。
Sometimes they're simply about finding a healthy way to tire hyperactive kids out so they'll sit still in class or get to bed at a reasonable hour.
有时候，体育不过是找到一种健康方式让多动的孩子筋疲力尽，好让他们能安静地坐在课堂上，或是在该睡觉的钟点上床睡觉。
Sometimes they're simply about finding a healthy way to tire hyperactive kids out so they'll sit still in class or get to bed at a reasonable hour.
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