自然清醒的过程有助于设定“生物钟”，让人们建立一个健康的睡眠和慢慢醒来的习惯。
The natural waking process helps to set "body clock" and makes people build a healthy sleep and wake habit slowly.
尽管从统计学上来说极不可能，但斯蒂尔有可能天生是个“短睡眠者”，拥有一个不寻常的生物钟。
It is possible—if statistically extremely unlikely—that Steel could be born a "short sleeper" with an unusual body clock, says sleep expert Dr. Sophie Bostock.
控制我们24小时睡眠和清醒生理周期的自然生物钟，生理的节奏很容易会被改变的时间表扰乱，他们深受光线和黑暗的影响。
The natural internal clock that controls our 24-hour cycle of sleep and waking, circadian rhythms are easily upset by changes in schedule, and they're greatly affected by light and darkness.
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