→作文｜Nowadays, a large number of students do not have breakfast everyday since they would like to spend more time making up their sleep…〔08-01〕

  →作文｜One of my roommate often talk when he sleeps. He talked about all kinds of things.For example ,last night, I had a hard jod to fal…〔03-13〕

  →作文｜Dear Any,亲爱的安妮，How is everything going! In the last letter you ask me what I usually do at weekends. I often sleep a lot at weeken…〔02-27〕

  →作文｜I often go to be at 21:30, because my parents force me to sleep. They tell me that a good rest can bring me a good body....…〔08-09〕

  →作文｜Since the weather becomes hotter that has greatly influenced on people's daily lives. People can not eat well and sleep well in su…〔05-14〕

  →美文｜It turns out that nodding off in class may not be such a bad idea after all, as a new study has shown that going to sleep shortly…〔04-05〕

  →作文｜冰雹是一个人的日常活动循环的一部分。人的睡眠分几个不同阶段的，而且也是循环发生。如果你是一个正常的睡眠者，你的睡眠周期如下。当你沉睡拳头漂移到了，你的眼睛会滚动几下，体温略有下降，肌肉放松，呼吸变得缓慢而有节奏。这时的脑电波变得缓慢而有节...…〔05-23〕

  →美文｜睡眠的演变 睡眠是古老的。从脑电图上看，我们与所有的灵长类动物，几乎所有的哺乳动物和鸟类都：它可能向后延伸至于爬行动物。 有一些证据表明，这两种类型的睡眠，做梦和无梦，依靠生命的动物作风，食肉动物在统计更可能比被捕食的梦想，这反过来又更容易...…〔05-08〕