不要用可能会扰乱深度睡眠的抗抑郁药，要清楚鼻塞药，节食药物和含咖啡因的饮料可能会阻碍你进行浅睡眠的能力。
Avoid taking antidepressants which may suppress REM sleep, and be aware that decongestants, diet pills, and caffeinated beverages may also thwart your ability to achieve REM sleep.
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。
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.
你的身体需要经历睡眠的三个步骤——浅睡眠、做梦和深睡眠——从而进行完全的自我修复。
Your body needs to experience all three steps of sleep—light sleep, dream, and deep sleep—to fully repair itself.
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