This could be due to the effects of our natural sleep-wake cycle, or circadian rhythm, the researchers suggest.
研究者表明，这是由于我们的自然睡眠-觉醒周期或者昼夜节律的影响。
Get active outdoors between 6:30 and 8:30 a.m.; it's the prime window to wake your body with sunlight, kicking off a healthy sleep-wake cycle.
早上6：30——8：30进行活跃的户外运动；这是通过阳光唤醒你身体，开启健康的醒睡周期的主要窗口。
In one study, about half of school pupils were able to shift their daily sleep-wake schedules by one hour.But significant change can be a challenge.
一项研究表明，大约一半的小学生可以调整他们每天的睡觉起床时间一小时，但更大的改变会成为一个挑战。
In one study, about half of school pupils were able to shift their daily sleep-wake schedules by one hour. But significant change can be a challenge.
一项研究表明，大约一半的小学生可以调整他们每天的睡觉起床时间一小时，但更大的改变会成为一个挑战。
Lack of light may upset your sleep-wake cycle and other circadian rhythms. And it may cause problems with a brain chemical called serotonin that affects mood.
缺乏光照有可能破坏你的醒睡周期和昼夜节律，还可能改变一种叫血清素的脑化学物质进而影响情绪。
Her body's clock is out of sync with the sleep-wake rhythm most of the world lives by. She goes to bed each night between 5:30 and 7:30 p.m. and wakes in the wee hours of the morning.
她每天下午5点半至7点半的这段时间里就要上床睡觉，并且会在第2天凌晨的时候起床，和世界上绝大多数人的睡眠清醒节律都不相同。
Your brain is most alert one to two hours after waking, according to the Sleep-Wake Disorders Centre in New York.
根据纽约的睡眠障碍中心的观点，在醒来后的一到两个小时，你的大脑是最为清醒的。
Sleep in peace and wake in joy.
平静地入眠，愉快地醒来。
Sleep: I typically go to bed before 10pm and wake up before 6:30 am.
保证充足的睡眠：我一般在晚上10点之前睡觉，早上6：30之前起床。
Sleep talking, sometimes called somniloquy, might wake up the person next to you, but it's harmless.
说梦话，有时称作梦呓，能吵醒你身边的人，但它是无害的。
It is very difficult to awaken a person in deep sleep, and children in this state may be nearly impossible to wake up.
处在深睡眠状态的人极难被唤醒，如果是儿童进入这种状态，唤醒他们几乎是不可能的任务。
The brain is resistant to arousal during deep sleep, which explains why it's difficult to wake a sleepwalker.
深度睡眠时大脑对外界的激励有抵抗力，这解释了为什么很难叫醒梦游者。
promise someone you will wake up early, that way its the first thing on your mind when you first wake up and going back to sleep isn’t an option.
向某人保证你会早点起来，这样，当你第一次醒来时，你脑子里想到的第一件事就是它，就不会选择重睡一次。
Now, a nightlight won't hurt, but keeping the TV or computer on or having your normal light on can cause us to wake throughout the night, disturbing our sleep.
现在，一个夜灯也没什么伤害，但是开着电视、电脑，或者开着平常的灯睡觉可能会让你整晚都醒着，扰乱睡眠。
Kids and pets can wake you up in the middle of the night and disrupt your sleep cycle.
孩子和宠物可能会在半夜把你吵醒，扰乱你的睡眠周期。
"The One," the elusive person who will unlock all of our potential, or with their deep, penetrating love, wake us up from our long deep sleep; yes, I would say this is the stuff of fairy tales.
“真命天子”虽然难以寻觅，却是那个能发掘我们所有潜能，用深沉的爱把我们从沉睡中唤醒的人。是的，这在童话故事中才会发生。
How is it that some people can sleep through sirens, blaring music or even an earthquake, while others will wake up if anyone so much as tiptoes into the room?
为什么有的人能够在警笛声、吵闹的音乐声、甚至是地震时继续保持睡眠状态，而其他的人则会被蹑手蹑脚进入房间的脚步声所唤醒？
If you are worried that you will not wake up on time, suggest to your subconscious mind prior to sleep the exact time you wish to arise and it will awaken you.
如果你担心你不能准时醒来，在入睡前向你的潜意识暗示你希望醒来的准确时间，它会在那个时间唤醒你。
If you are worried that you will not wake up on time suggest to your subconscious mind prior to sleep the exact time you wish to arise and it will awaken you.
如果你担心你不能准时醒来，在入睡前向你的潜意识暗示你希望醒来的准确时间，它会在那个时间唤醒你。
If your woken from deep sleep but can go back into a light sleep, you will find it easier to wake from a light sleep.
如果你从深度睡眠中醒来了，但可以重新回到轻度睡眠中，你会发现从轻度睡眠中醒来更容易。
I advise keeping the nap between 15 and 30 minutes as you want to avoid getting into deeper stages of sleep. If you do, you'll find it harder to wake and may experience the groggy feeling for a while.
我建议小睡时间保持在15—30分钟之间避免进入深度睡眠，一旦你进入深度睡眠，你会发现很难醒过来，而且醒来之后会有段时间脑袋昏昏沉沉。
Called NovaDreamer, the device is a sleep mask that knows when to give cues — flashing lights — to the dreamer to stimulate awareness, but not wake him.
这种装置被称为“新梦人”，是一种睡眠面具，它知道何时向睡梦者提供暗示——闪灯——能刺激他的意识，又不吵醒他。
If you need to reset your sleep cycle in one day, stop eating for the 16 hours before the time you want to wake up.
如果你哪天需要调整自己的生物钟，在新的睡觉时间的前十六个小时内别吃东西。
Throughout history, famous figures like Napoleon have stated that they focus on their problems just before they sleep, and tend to have an answer when they wake up.
历史上的著名人物，如拿破仑，就声称他们在临睡之前会集中思考问题，等一觉醒来往往就可获得答案。
Another thing: when I began to sleep earlier and wake earlier, it threw my sleeping patterns off for awhile.
顺便提一下：当我早睡早起后，改变了我以前的睡眠模式。
Another thing: when I began to sleep earlier and wake earlier, it threw my sleeping patterns off for awhile.
顺便提一下：当我早睡早起后，改变了我以前的睡眠模式。
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