If you go to bed late, you will be sleepy in class.

如果你睡得晚，你会在课堂上犯困。

youdao

A: OK.I have to go now.I'm going to be late for class.

好了，现在我得走了。我上课要迟到了。

youdao

Classmates can be up late, or relax, but I still have to 7 o 'clock in the morning, running up and grooming later, she brought the "Three Kingdoms" go to class.

别的同学都可以睡懒觉，或者放松身心，可我还是要在早上7点钟跑起来，梳洗后带着本《三国演义》去上课。

youdao

I do try to start a few minutes late, but I also have to finish a few minutes early so you can go to your next class.

我已经推迟上课好几分钟了,我还得提前下课,好让你们能赶上下一节课

耶鲁公开课 - 基础物理课程节选

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BBC: Kozak returns as Stingrays lose

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FORBES: Little Luxuries