最被熟知的，德库西说，是生理的或昼夜节律像睡眠-清醒节律、每日活动节律、或者乘坐飞机旅行的时差感和轮班工作病。

The best-known ones, DeCoursey says, are circadian or daily rhythms such as the sleep-wake rhythm, daily activity rhythms, or jet lag and shift-work maladies.

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为什么一些人较之其他人更显得和蔼可亲呢？原因可能在于，他们身上持有生理节奏基因的特定变体。这种基因因其昼夜节律而显得至为重要。

Why are some people more agreeable than others? It may be because they possess a certain variant of the CLOCK gene. This gene is critical to circadian rhythms.

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捣乱生物钟——万物生灵生理过程中的昼夜节律——绝不是个好主意。

TINKERING with the circadian clock, the day-and-night cycle in the physiological processes of all living beings, is rarely a good idea.

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