You program the clock with the latest time at which you want to be wakened, and it then duly wakes you during the last light sleep phase before that.
你给时钟设定了你想要醒来的最晚时间，然后它会在之前的浅睡眠阶段按时叫醒你。
The first 30 minutes is a light sleep that helps improve motor performance.
头30分钟是浅睡，帮助改善运动功能。
Also, the amount of light sleep increases with age, and the amount of deep sleep is reduced.
同样，轻度睡眠也随着年龄的增加而增加，深度睡眠则相反。
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。
At the first crow of roosters she wakes up, looks at the dark room, listens to the sound of silence before daybreak, and falls back into a light sleep.
头鸡刚叫的时候，她就会醒过来，看一看黑黑的房间，听一听黎明前寂静的声音，再浅浅地睡过去。
Conclusion Apnea events happened most frequently in light sleep stage. The reason is still unclear.
结论睡眠呼吸暂停事件明显多见于浅睡眠期，具体原因有待进一步探讨。
In the first 90 minutes of sleep, you go through deepening stages-ranging from light sleep to deep sleep.
刚刚入睡的90分钟里，你经历了多个从浅睡到深睡的睡眠深化阶段。
Results sleep apnea events were found in each different sleep stage. The events happened frequently in light sleep stage, most in stage 2.
结果睡眠呼吸暂停事件在睡眠各期均可出现，但多见于浅睡眠期，以2期最明显。
The point in that cycle (light sleep deep sleep and REM sleep) at which you wake can affect how you feel later and may even have a greater impact than how much or little you have slept.
你醒来的那个循环点（轻睡、熟睡、REM睡）会影响你之后的感觉，其影响甚至比你睡觉的长短还大。
The point in that cycle (light sleep deep sleep and REM sleep) at which you wake can affect how you feel later and may even have a greater impact than how much or little you have slept.
你醒来的那个循环点（轻睡、熟睡、REM睡）会影响你之后的感觉，其影响甚至比你睡觉的长短还大。
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