Scientists have discovered remarkable new evidence showing how the body rebuilds itself while we sleep.
科学家们已经发现了非同寻常的新证据，证明睡眠时我们的身体如何自行恢复。
There is a hypothesis that we sleep so that our brain can repair and refresh itself.
有一种假设是，我们睡觉是为了让大脑自我修复和更新。
When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic "morning breath".
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”。
Science tells us that we sleep better in cooler temperatures of about 60 to 67 degrees Fahrenheit (15℃ to 20℃).
科学告诉我们，我们在60到67华氏度（15到20℃）的凉爽温度下睡得更好。
The bedroom is the main place where we sleep at night, so its environment directly affects the quality of our sleep.
卧室是我们晚上睡觉的主要场所，所以它的环境直接影响我们的睡眠质量。
After we sleep for 7 or 8 hours in bed and wake up next morning, our mind is better prepared to memorize and learn something.
我们在床上睡了7到8个小时，第二天早上醒来后，我们的大脑就会更好地去记忆和学习一些东西。
Why do we sleep and why don't we — why aren't we always awake?
我们为什么会睡觉，我们为什么不是一直醒着？
When we sleep, our body produces a hormone called melatonin.
睡觉的时候，身体会释放出一种叫做褪黑激素的物质。
"Hermes didn't help much this time," I say to Marc before we sleep.
“这一次，赫尔墨斯没有帮到我们多少。”在入睡之前，我对马克说到。
Over the years, scientists have come up with a lot of ideas about why we sleep.
关于我们为什么要睡觉，多年来，科学家提出了很多想法。
I mean, think about it, we sleep, we wake up, and we magically feel refreshed, right?
我的意思是，仔细想想，我们睡觉，我们醒来，我们魔法般地感受到了精神的恢复，是吗？
Unfortunately there are only 24 hours in a day, and we sleep for about 8 of them.
不幸的是一天只有24个小时，其中有8小时用于睡眠。
Our brains seem to know this and practice responding to threatening situations while we sleep.
我们的大脑似乎对此很清楚，在我们进入睡眠时不断练习对危急情况的反应。
As we sleep, our brains work through the day's memories, focusing on the most emotionally resonant parts.
当我们睡眠时，我们的脑部对白日的记忆进行工作处理，聚焦于最能引起情感共鸣的部分。
When we sleep, the scientists argued, our brains pare back the connections to lift the signal over the noise.
当我们睡觉时，大脑得以减少连接，这样真正的信号才可以超过噪声。
In other words, the brain is active even when we are asleep - and the more active the thalamus, the better we sleep.
换句话说就是，当睡着了的时候，我们的大脑仍然是活动的，并且丘脑的活动越频繁，我们就睡的越好。
Some Native American tribes and Mexican civilizations believed dreams were a different world we visit when we sleep.
一些美洲印第安人部落以及墨西哥文明则相信梦是在我们睡眠时拜访的一个不同的世界。
But there are some surprising findings when it comes to how and when we sleep, as it pertains to our ability to learn.
但也有一些令人吃惊的发现揭示睡眠的方式和时间可以影响我们的学习能力。
The position we sleep in may not be the sort of thing worth paying much attention to, but it can have a huge impact on our health.
睡觉姿势或许并不值得这么大惊小怪，但它确实对我们的身体健康产生巨大影响。
It's possible that while we sleep, the brain is practicing and running problem-solving drills before completing actions in the real world.
当我们睡梦中，很可能我们的大脑会为现实世界中的行动提前做解决难题的演练。
A gene that controls how long we sleep has been discovered by scientists explaining why some people have their own internal alarm clock.
科学家们发现了一种能控制人睡眠时间长短的基因，这解释了为什么一些人拥有自己私人的生物钟。
This 40-minute "super memory" period is divided into two parts: the 20 minutes before we sleep, and the 20 minutes after we first awake.
而这“记忆超强”的40分钟又可以分为两段：临睡前的20分钟和醒来后的20分钟。
Now, two recently published studies come up with an interesting explanation: we sleep to forget some of the things we learn during the day.
现在，两篇新近发表的研究提出了一个有趣的解释：我们入睡是为了忘掉白天学到的某些东西。
Why do we close our eyes when we sleep, when we cry, when we imagine, when we kiss? Because the most beautiful thing in the world is unseen.
为什么我们闭上眼睛，当我们睡觉，当我们哭泣，当我们想像，当我们亲吻？因为，世界上最美丽的东西是看不见的。
The biological timekeeper deep in the brain that governs when we sleep and when we wake runs at a faster pace in women, a new study shows, NPR reported.
据美国国家公共广播电台（NPR）报道，最新研究显示，较之于男性，女性大脑中控制何时入睡、何时清醒的生物钟走得更快。
As exciting findings such as these come in more and more rapidly, we are becoming sure of one thing: while we sleep, our brain is anything but inactive.
随着这类振奋人心的发现的越来越快出现，我们越来越坚信一个事实：当我们入睡后，我们的大脑绝对不是处于停滞状态。
But I really want you can hold me in your arms when we sleep, take my hand when we walk together, put the food you do not like into my plate, and much more than these!
可是我想你睡觉的时候可以抱着我，走路的时候可以勾住我的手，吃饭的时候可以把不好吃的菜放到我的盘子里，比这都更多更多。
But I really want you can hold me in your arms when we sleep, take my hand when we walk together, put the food you do not like into my plate, and much more than these!
可是我想你睡觉的时候可以抱着我，走路的时候可以勾住我的手，吃饭的时候可以把不好吃的菜放到我的盘子里，比这都更多更多。
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