论文部分内容阅读
基本目的一般来讲,人们的大多数时间是在家中度过的。就睡眠来讲,人一生有大约1/3的时间在睡眠中度过。经计算,在每天的睡眠期间,人与外界交换近
Basic purpose In general, people spend most of their time at home. In terms of sleep, people spend about a third of their lives in their sleep. It has been calculated that people exchange with the outside world during their daily sleep