美科学家谈人类进化：人脸是被“打”出来的

背景介绍：

梦——古今中外，无数文学影视作品对其进行了不断的探讨和思索。相信很多人听说过科学家在梦中解决了科学难题的故事吧？但它对于很多人来说，始终是谜一般的存在。

话题：

1、分享一下你认为比较离奇的梦境。

2、如果梦境可以得到记录，你愿意将其记录下来吗？

范例1：

If it's possible, I would like to have my dream recorded by some sort of instrument. Because for the first, I wonder what has happened in my dream. It would be great to 'replay' them in front of me when I am awake. And what's more, dreaming accounts for almost one third of human beings' life span, which deserves our attention. The most important thing is, sometimes, we do get some brilliant ideas during dreaming. Many people tried to record them and unfortunately they failed. Recording the dream should be a huge breakthrough and a revolutionary invention for human beings.

范例2：

Dreaming seems to be a very interesting phenomenon. There are theories suggesting that it may be a way for the brain to process and sort all the information collected during a person's activities throughout the day. The brain decides whether the information will be saved to the long-term memory or be discarded. Dreaming happens during the deepest level of sleep, accompanied by rapid eye movement (REM). If a person cannot enter this stage of deep sleep, he or she will be feel well-rested and may feel stressed. It also appears that animals also dream and experience REM sleep.