Some of you are awake but non attentive and your brain's giving you these large,

有些人虽然清醒但是注意力不集中你们的脑袋正产生大规模
regular alpha waves. Some of you are sound asleep, deep in delta.

规则的α电波有些人已经睡着了沉浸在δ波中
When you sleep you get the following stages.

当你睡觉的时候你会进入以下这些阶段
You start off with a transition period when you're falling asleep.

当你进入睡眠后你会先进入过渡时期
We call that stage I. Then you get successively deeper,

我们称它为第一阶段然后你会睡得越来越深
II through IV, slow, irregular, high amplitude delta waves,

从第二到第四阶段缓慢地不规则地高振幅的δ波
and then once you reach stage IV you start going up again,

一旦进入到第四阶段又开始变浅经过第三和第二阶段
up through stage III and II. Then REM sleep emerges, rapid eye movement sleep.

然后出现快速眼动睡眠即在睡觉时眼球产生快速运动
REM sleep is neat because your brain looks like it's wide awake

快速眼动睡眠很整洁因为你的大脑看起来像是很清醒的
but And I'm going to talk a little bit more in detail about this later.

待会我会对这个进行更深入的解说
You're relaxed, your rapid eye movements occur;

你很放松眼球快速的运动
that's where your--the name comes from

这是这个名称的来源