当我们睡觉时，大脑在做什么？

What does the brain do while we are sleeping?

youdao

随着它们越来越好动，白天我们让它们在家里自由活动，但当我们睡觉时，我们必须把它们关在一个大房间里，否则它们就会胡作非为。

As they grew more mobile, we let them move freely around the house during the day, but when we were asleep we had to contain them in a large room, otherwise they'd get up to mischief.

youdao

例如，当我们睡觉时，唾液流变慢，产生硫的细菌占上风，便会产生典型的“晨起口臭”。

When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic "morning breath".

youdao