| 1. | Some animals only half - hibernate ， that is to say ， their sleep is not such a deep one
有些动物只是半冬眠，就是说，它们的睡眠并不是深度睡眠。 |
| 2. | The waves grow slower as a person sinks down into the next two levels of deeper sleep
在进入第二和第三阶段的深度睡眠后，脑电波开始变得缓慢。 |
| 3. | Sleepwalking usually happens in the first few hours of sleep in the stage called slow - wave or deep sleep
梦游经常发生在入睡最初几个小时的放松阶段或深度睡眠时。 |
| 4. | We experience some deep , quiet sleep and some active sleep , which is when dreams happen
我们的经验是那些深度睡眠、松心类睡眠和一些兴奋类睡眠，当他们做梦时会出现梦游。 |
| 5. | Deep sleep is essential as it is the time when the body rejuvenates cells and repairs damage suffered during the day
深度睡眠对健康很重要，因为身体在这段时间内会更新细胞及修复白天的损伤。 |
| 6. | Depending on how much in debt you may be , two nights of at least eight hours of deep sleep should get you back into balance .
取决于你欠了多少债,两个晚上每晚至少8个小时的深度睡眠能够是你的睡眠回到平衡 |
| 7. | The first group took longer to enter the first of the deeper stages of sleep and spent less time in the deepest one
结果发现，受到辐射的那组研究对象进入深度睡眠第一阶段所用的时间较长，而且深度睡眠的时间也较短。 |
| 8. | This changes the level of brain wave activity from the awake level ( beta ) to the asleep level ( alpha ) or the deep sleep level ( theta )
这使大脑清醒状态时的脑波活动贝塔状态改变至睡眠层次（阿尔法）或深度睡眠状态（太塔， ） 。 |
| 9. | A disorder characterized by sudden and uncontrollable , though often brief , attacks of deep sleep , sometimes accompanied by paralysis and hallucinations
嗜眠病以突然的和不由自主的，虽然通常短暂的深度睡眠发作，有时伴随有麻痹和幻觉为特征的一种紊乱 |
| 10. | You do not remain at this deep fourth stage all night long , but instead about 80 minutes after you fall into slumber , your brain activity level will increase again slightly
这种第四阶段的深度睡眠并不会持续整个晚上,在你进入深度睡眠大约80分钟后，你的大脑活跃水平将又会慢慢提升。 |
