与美国小学生一起学英文第12册 第32期:睡眠循环

 　　Sleep Cycle 睡眠循环

　　Do you know there are five stages of sleep? 你知道睡眠分五个阶段吗？

　　During the first four stages of sleep, the human body and brain take a rest. 在睡眠的前四个阶段，人的身体和大脑休息。

　　But during the fifth stage of sleep, the brain works¹ hard, so we have dreams. 但在第五个阶段，大脑很努力地工作，所以我们做梦。

　　If you always takes one hundred minutes to experienced² all five stages of sleep, what happens then? 如果你总是花100分钟去经历睡眠的五个阶段，那么接下来会发生什么呢？

　　We'll repeat this five stages again. 我们将再次重复这五个阶段。

　　People usually have three to four sleep cycles during their night sleep. 在夜间睡眠中，人们通常有三到四个睡眠循环。

　　People can remember their dreams if they wake up during the fifth stage. 如果人们在第五个阶段醒来，他们就能记住自己的梦。

　　But they forget their dreams during the next cycle of sleep. 但他们会在下一个睡眠周期中忘记了自己的梦。

1 works   

n.作品，著作；工厂，活动部件，机件

参考例句：

• We expect writers to produce more and better works.我们期望作家们写出更多更好的作品。
• The novel is regarded as one of the classic works.这篇小说被公认为是最优秀的作品之一。

2 experienced   

adj.有经验的；经验丰富的，熟练的

参考例句：

• Experienced seamen will advise you about sailing in this weather.有经验的海员会告诉你在这种天气下的航行情况。
• Perhaps you and I had better change over;you are more experienced.也许我们的工作还是对换一下好，你比我更有经验。