Your eyes drift separately and slowly you're hard to wake up.

你的眼睛各自慢慢地转动很难被叫醒
Then there is REM sleep. Your brain is active as if you were awake,

另一种则是快速眼动睡眠这时你的大脑像你清醒时一样活跃
your EEGs are similar to waking, paralyzed except for the eyes,

此时的脑电图跟清醒时的很相似全身肌肉放松除了眼睛
oh, men get erections and you have dreams.

男性勃起和做梦
One sleep researcher joked that these two are connected

一个睡眠研究者开玩笑说这两个是相关联的
because what happens is dreams fly around through the ether

当你梦到自己在天空中飞翔时
and then their erections serve as antennas so you pick them up.

他们就会勃起来充当天线的作用
Don't write that down.

不用把这个写下来
Why do we sleep and why don't we-- why aren't we always awake?

为什么我们要睡觉为什么我们不为什么我们不总是醒着
There's a couple of answers to this.

对于这个问题有很多种答案
Probably the best answer is our body is worn out during the day

最好的答案可能是我们身体在白天筋疲力尽
and sleep is necessary to put it back into shape.

睡眠是使身体恢复如初的必需品