人体的生理与行为节律是由内源性昼夜节律钟产生与调控的。
Physiological and behavioral rhythms are governed by an endogenous circadian clock.
人类的褪黑激素水平在夜晚上升，以响应黑暗和昼夜节律钟发出的信号。
In humans melatonin levels rise at night, in response to darkness and cues from the circadian clock.
人类的生活周期是24小时，这个周期的形成不只是因为有白天和黑夜，它还与人脑内主要的计时器昼夜节律钟有关。
Humans are pegged to a 24-hour cycle. We're locked into it not just by day and night-there's the master timepiece in the brain called the circadian clock.
而驯鹿呢，虽然它们没有昼夜节律钟，其褪黑激素水平仍然会在黑暗的时候上升，光亮的时候下降，从而使它们的昼夜分点达到理想状态，进而与年生物钟同步。
In reindeer, even if they're missing a circadian clock, melatonin levels still spike when it's dark and drop when it's light, making the equinoxes an ideal time to synchronize their annual clocks.
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.
生物节律：由生物钟控制的周期性的生理上的或行为上的变化。昼夜节律就是一个很好的例子。
Biorhythm a periodic physiological or behavioral change that is controlled by a biological clock. Circadian rhythms are an example.
验血结果表明，这两位妇女含突变基因DEC2，它能影响昼夜节律，也就是人体生物钟。
Blood tests showed the women harbored a mutation in a gene named DEC2 that's involved in regulation of circadian rhythms, the body's clock.
这些提议基于对昼夜节律(也就是我们内部的生物钟)更深层的认识，因为昼夜节律决定了我们的注意力、清醒状态和劳动能力何时能达到最佳水平。
The recommendations arise from a deeper understanding of circadian rhythms - our internal body clock, which determines optimum levels of concentration, wakefulness and work ability.
生物钟是中央昼夜节律机制。
Circadian clocks are the central mechanisms that drive circadian rhythms.
在人工恒定环境下，活体生物的昼夜节律生物钟通常运行的时间周期在22到26小时不等。
Circadian clocks in living creatures usually operate on a time cycle that varies between 22 and 26 hours in artificially constant environments.
哺乳动物中的昼夜节律系统由位于下丘脑scn核内的生物钟主钟和位于多数外周细胞中的子钟组成。
The circadian system in mammals is composed of a master pacemaker in the suprachiasmatic nucleus (SCN) of the hypothalamus and slave clocks in most peripheral cell types.
《国际糖尿病》：我明白了。形成昼夜节律性有哪些步骤呢，以及如何来理解生物钟呢？
International Diabetes: I see. What steps have been taken in circadian rhythm and understanding the clock?
生物钟基因普遍存在于生物界，其作用在于产生和控制昼夜节律的运转。
The circadian clock genes, which generate circadian rhythms and maintain its the running, exist in organisms ranging from prokaryotes to mammals.
【译】光在夜间的昼夜节律生物钟和代谢的影响。
The Effects of Light at Night on Circadian Clocks and Metabolism.
【译】光在夜间的昼夜节律生物钟和代谢的影响。
The Effects of Light at Night on Circadian Clocks and Metabolism.
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