求翻译：There are times when people are so tired that they fall asleep almost anywhere. We can see there is a lot of sleeping on the bus or train on the way home from work in the evenings. A man will be__22____the newspaper, and seconds later it __23___ as if he is trying to ___24__it. Or he will fall asleep on the shoulder of the stranger___25__ next to him.___26___ place where unplanned short sleep __27__ is in the lecture hall where a student will start snoring（打鼾）so ___28____that the professor has to ask another student to___29___ the sleeper awake. A more embarrassing（尴尬）situation occurs when a student starts falling into sleep and the ___30___ of the head pushes the arm off the___31___, and the movement carries the__32___ of the body along. The student wakes up on the floor with no___33___ of getting there. The worst time to fall asleep is when __34___ . Police reports are full of ___35___ that occur when people fall into sleep and go__36_____ the road. If the drivers are ___37____ , they are not seriously hurt. One woman's car, ___38____ , went into the river. She woke up in four feet of __39____ and thought it was raining. When是什么意思？

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