A heavy meal at night causes tossing and turning and a prolonged emotional stress while at sleep.
晚上吃得很多会让你睡觉时辗转反侧并增加情绪上的压力。
This study looked at sleep that was fragmented, but not shorter or less intense than normal for the mice.
而此次研究观察的是断断续续的，但是不比正常睡眠时间短或强度弱的睡眠。
In a follow-up study with the virtual-skiing game Alpine Racer, 14 of 16 students reported seeing skiing images at sleep onset (as did three people who were merely observing the experiment.)
在一项用虚拟滑雪游戏《高山滑雪》(AlpineRacer)进行的后续研究中，16名学生中的14名报告说，他们在刚开始入睡时见到了滑雪的图像(3位只是观察了这个实验的人也是如此)。
What we do know is that people tend to have different kinds of nightmares at different points during the sleep cycle.
我们现在所知道的就是，人们在睡眠周期的不同阶段往往会做不同类型的噩梦。
Perhaps developing a sense of purpose in life could be as useful at improving sleep as the healthy habits above.
也许在生活中培养一种使命感可以像上面提到的健康习惯一样有助于改善睡眠。
Birds also can sleep with both hemispheres resting at once.
鸟类也可以在左右半脑同时休息的情况下睡觉。
When they sleep, they seldom lie down and sleep for minutes at a time, since it's difficult for them to get up again and it's dangerous in the wild.
当它们睡觉的时候，它们很少躺下来一次睡上几分钟，因为它们很难再起来，在野外这是很危险的。
Dr Dominoni, who is putting cameras inside nesting boxes to track sleeping patterns, said lack of sleep could put the birds' health at risk.
多米诺尼博士把摄像机放在巢箱里，以追踪鸟儿的睡眠模式。他说，睡眠不足可能会危及鸟儿的健康。
He looked at Ellen, breathing evenly in her sleep.
他看着在睡梦中呼吸均匀的埃伦。
How can he sleep soundly at night? He's the one responsible for all those crimes.
他晚上怎么能睡得香？他可是所有那些犯罪活动的罪魁祸首啊。
It was easy for us to go to sleep at the end of the day feeling a little misunderstood.
在一天结束的时候，我们很容易在被误解的感觉下入睡。
The fairies are to put it high up among the tree tops where they sleep at nights.
仙子们要把它放在高高的树梢上，那是他们晚上睡觉的地方。
When we sleep below six hours per we're at an increased risk of health problems.
当我们每小时睡眠不足6小时，就会有增加我们健康问题的风险。
Reducing the amount of sleep students get at night has a direct impact on their performance at school during the day.
减少学生晚上的睡眠时间会直接影响他们白天在学校的表现。
My cough got so much worse that I couldn't sleep at night, so I decided to give it a try.
我的咳嗽变得更加严重，以至于我晚上无法入睡，因此我决定尝试一下。
People suffering from sleep-loss are at an increased risk from obesity, psychological problems and car crashes.
睡眠不足的人面临肥胖、心理问题和车祸的风险更高。
Giraffes don't need much sleep at all.
长颈鹿根本不需要太多的睡眠。
We should sleep at night with windows open.
我们晚上应该开着窗户睡觉。
They can sleep at most 8 hours a day.
他们一天最多睡8个小时。
Taking a 20-minute sleep at noon is also useful.
中午睡20分钟也很有用。
Fourth, make sure we have a good sleep at night.
第四，确保我们晚上睡个好觉。
She couldn't sleep at night and often talked to herself.
她晚上睡不着觉，经常自言自语。
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。
If they don't get enough sleep at night, they will face more challenging situations in schoolwork.
如果他们晚上没有充足的睡眠，他们将在学业上面临更多挑战。
I felt so uncomfortable that I couldn't sleep well at night.
我觉得很不舒服，晚上都睡不好。
Middle school students should have at least 8 hours' sleep every day.
中学生每天至少应该保证8小时的睡眠时间。
People who get plenty of physical activity might worry less and sleep better at night.
锻炼充分的人可能会更少产生担忧的情绪，晚上也会睡得更好。
Production of the sleep hormone melatonin begins at dark.
睡眠荷尔蒙褪黑素在夜间开始分泌。
In the Sahara, we should stay out of the sun during the day and find a warm and safe place to sleep at night.
在撒哈拉沙漠，我们白天要避开太阳，晚上要找一个温暖安全的地方睡觉。
In the Sahara, we should stay out of the sun during the day and find a warm and safe place to sleep at night.
在撒哈拉沙漠，我们白天要避开太阳，晚上要找一个温暖安全的地方睡觉。
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