This explains why we sleep at all and this probably

这解释了为什么我们要睡觉
explains why we sleep at night.

可能解释了我们为什么要在晚上睡觉
There are sleep disorders. I won't go through them.

存在睡眠障碍我不会把它们全部列举出来
I just list a few of them here.

这里我只列出一些睡眠障碍
They're sort of bad things that could happen to you when you're asleep.

它们算是在你睡觉的时候出现的坏事了
One particularly trendy sleep disorder that's been discovered recently

最近发现的一个特别流行的睡眠障碍
are side effects of sleeping pills such as Ambien.

是如安必恩这类安眠药的副作用
So, one of the bizarre side effects is some people with Ambien

服用过安必恩的人有一个奇怪的副作用
while sleeping go downstairs,

他们睡着后会走下楼
open up their refrigerator and eat huge amounts of food.

打开冰箱然后吃大量的食物
A more recent side effect of Ambien that's quite serious

最近发现了安必恩一个更严重的副作用
is some people become--

有些人变得