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。
We wear pajamas to keep us comfortable when we sleep.
睡觉时，我们穿上睡衣裤保证舒适。
We sleep 7 hours a day, which is obviously not adequate for young students.
我们每天睡7小时，这对于青年学生来说明显是不够的。
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”。
We sleep out under the stars, and eat our meals in the open air.
我们露宿在星空下，在户外用餐。
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。
今晚，我们将睡在山洞里。
我们在船上睡么？
We sleep better than we think we do.
我们的睡眠质量，比我们们想象中要好得多。
We sleep well. We say a lot of prayers.
我们睡得很好，也作了许多祈祷。
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, growth hormone, or HGH. is released into our bodies.
我们睡觉的时候，身体会释放生长激素或者人体生长激素。
This reserve is earning "a pittance," he says. "But we sleep well."
他说，这笔储备赚钱很少，但保证“我们睡的安稳”。
(Read about secrets of why we sleep in National Geographic magazine.)
(请参考国家地理杂志《睡眠的奥秘》一文)。
We sleep, and 13 at length awake to the still reality of a winter morning.
我们也睡着了，一觉醒来，正是冬天的早晨。
This explains why we sleep at all and this probably explains why we sleep at night.
这个解释了我们为什么要睡觉，这个解释了我们为什么在晚上睡觉。
Much of what we do is habit, from brushing our teeth to the side of the bed we sleep.
我们做的很多事情就像我们刷牙还有我们睡觉时选择睡哪一边一样，是出于一种习惯。
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。
'replay' is the hypothesis that the brain 'replays' the actions of the day while we sleep.
“回放”是对大脑会在睡觉时重复当日行动的假设。
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。
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。
Why does the rustle of sheets wake us up on some nights, but we sleep through the sound of our alarm clocks going off on others?
为什么我们在某些夜晚会被床单发出的沙沙声吵醒，却没有理会那些吵醒别人的闹钟声而睡过头呢？
Why does the rustle of sheets wake us up on some nights, but we sleep through the sound of our alarm clocks going off on others?
为什么我们在某些夜晚会被床单发出的沙沙声吵醒，却没有理会那些吵醒别人的闹钟声而睡过头呢？
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