We need sleep (even just a nap) to move anything we've recently learned into our brain's long term storage.
我们需要睡眠(哪怕只是打盹)将最新学习的东西转换到大脑的长期储存中。
One theory for why we need sleep is that our brains use the opportunity to consolidate memories from that day.
关于为什么人类需要睡眠的一个理论是，我们的大脑利用这个机会整合一天的记忆。
It's ironic that the time in our life when we need sleep the most is the time when we're most tempted to skimp on sleep. Adequate sleep is essential for college students.
非常讽刺的是在我们的生命中我们用来睡觉的大多数时间都是从我们本来应该的睡眠时间中节省下来的。充足的睡眠对大学生来说是十分重要的。
In two papers published today in Science, researchers find clues to the long-standing mystery of why humans need sleep, by studying the way Drosophila catches its Z's.
在当今科学界发表的两篇论文中，研究人员通过捕获果蝇并对其研究，发现了长期困扰人类为何需要睡眠的奥秘。
When you sleep through the alarm or simply need an extra 10 minutes, you can just pluck it off the hanger and go.
当你睡着一直没听见闹钟，或者只是需要多睡10分钟的时候，你可以把闹钟从衣架上拿下来就走。
These results suggest that if a business wants to prosper, it should hire only people who need less than 6 hours of sleep per night.
这些结果表明，如果一个企业想要成功，它应该只雇佣每晚睡眠时间少于6小时的人。
In our society, you're considered dynamic if you say you only need 5.5 hours' sleep.
在我们的社会，如果你说你只需要5个半小时的睡眠，人们就会认为你很有活力。
In places like Bali and New Guinea, people tend to slip in and out of sleep as they need it, napping more during the day, and getting up more at night.
在有些地方，例如巴厘岛和新几内亚，人们喜欢随时根据需要进入睡眠和醒来，白天时不时的打个盹儿，晚上却经常的爬起来不睡觉。
That suggests that catch-up sleep may undo some but not all of the damage that sleep deprivation causes, which is encouraging, given how many adults don't get the hours they need each night.
这表明补觉可以弥补部分但不是全部睡眠缺乏造成的损害，考虑到有很多成年人每晚都没有得到他们所需的睡眠时间，这令人鼓舞。
To prepare for this before winter, these animals eat extra food to become fat which gives them the energy they need while they sleep.
为了在入冬前做好准备，这些动物会吃更多的食物来增肥，从而获取睡眠时所需的热量。
In order to ensure our kids get the sleep they need, both parents and schools should make an effort.
为了确保我们的孩子获得所需的睡眠，父母和学校都应该做出努力。
How long do teenagers need to sleep?
青少年需要睡多久？
Giraffes don't need much sleep at all.
长颈鹿根本不需要太多的睡眠。
Most adults need seven to nine hours' sleep while teens need even more.
大多数成年人需要7到9小时的睡眠，而青少年所需时间更长。
Children and teenagers need nine to ten hours of sleep, while adults need six to eight.
儿童和青少年需要9到10个小时的睡眠，而成年人需要6到8个小时。
Children need 10-12 hours of sleep a day.
儿童每天需要10-12个小时的睡眠。
The older you get, the less sleep you will need.
年龄越大，所需睡眠就越少。
Doctors and health scientists say: When you close your eyes and need to rest, sleep is just the very best!
医生和健康专家说：当你闭上眼睛需要休息时，睡觉就是最好的！
Teenagers need 8-10 hours of sleep a day because they need lots of energy to grow into their adult bodies.
青少年每天需要8-10个小时的睡眠，因为他们需要大量能量来长成成年人的身体。
Grown-ups usually need 6-8 hours of sleep to keep active.
成年人通常需要6-8小时的睡眠来保持活力。
In general, babies need fifteen to sixteen hours of sleep a day.
一般来说，婴儿每天需要15到16个小时的睡眠。
Most people need seven or eight hours of sleep to feel their best during the day.
大多数人需要七到八小时的睡眠才能在白天保持最佳状态。
The bottom line is that you need to study, eat a good meal, sleep well on the eve of the test, and believe that your efforts will pay off.
底线是你需要在考试前夕学习，吃好饭，睡好觉，并相信你的努力会得到回报。
I've decided to have a good sleep by taking a walk or seeing a movie. I really need to relax.
我决定去散步或看电影，好好睡一觉。我真的需要放松一下。
He may be hungrier than usual, need more sleep, or return to waking up several times a night.
他可能会比平常更加饥饿，需要更多睡眠，或者像以前一样夜里醒来好几次。
Whether you've got narcolepsy, insomnia, or simply aren't getting the sleep you need, sleep problems are serious.
无论您有嗜睡，失眠，或根本就没有得到您需要的足够睡眠，睡眠问题是严重的。
If you're currently sleeping around 8 to 10 hours and you feel LOW on energy during the day, it's not because you need more sleep.
如果你现在睡眠时间在8 -10小时左右而你感到一天的活力很低，不是因为你需要睡更多。
He also speculated that the need for sleep was akin to food, where getting less than people want may be better for them.
他还认为人们对睡眠的需求就如同对食物需求一样，实际摄入量比需求量少一点可能对健康有益。
He also speculated that the need for sleep was akin to food, where getting less than people want may be better for them.
他还认为人们对睡眠的需求就如同对食物需求一样，实际摄入量比需求量少一点可能对健康有益。
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