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。

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I have a circadian rhythm disorder called delayed sleep phase syndrome.

我有昼夜节奏紊乱的问题，即睡眠相位后移综合症。

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The longer the deep sleep phase gets, the more HGH and testosterone you produce.

马格尼斯说，“深度睡眠的时间越长，身体就能生成更多的生长激素和睾酮。”

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The Sense of Smell Institute found that lavender increases the amount of time spent in the restful, restorative phase of sleep.

CNN: Sleep tips for the road-weary

Sleep therapists correct the syndrome by forcing the advanced phase patients to stay up late and exposing them to bright light around 0230 AM - helping to "manually" reset the clock.

BBC: 'Sleepyhead gene' discovered