Melatonin is the principal neuroendocrinologic hormone secreted by the pineal gland, and is of the physiologic modulation in mood, sleep, sexual behavior, reproductive alterations, immunologic function, and circadian rhythms.
褪黑素是由松果体合成的一种重要神经内分泌激素，具有多种 生理调节作用，能够影响情绪、睡眠、性行为、生殖周期、免疫 功能和昼夜节律。
参考来源 - 褪黑素受体在胎脑中的分布The circadian clock genes ,which generate circadian rhythms and maintain its the running, exist in organisms ranging from prokaryotes to mammals.
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。
参考来源 - 大豆生物钟基因GmLCL1/2和GmTOC1的克隆及其功能分析·2,447,543篇论文数据，部分数据来源于NoteExpress
This is a benign variation within circadian rhythms known as a chronotype.
这是一种被称为睡眠类型的昼夜节律的良性变化。
Regular mealtimes, not just regular sleep times, help regulate our circadian rhythms.
不仅是有规律的睡眠时间，有规律的饮食时间也对调节我们的生理节奏有帮助。
And that light pollution could_3_our circadian rhythms, which control not only sleep, but metabolism.
而生理节奏不仅控制着人们的睡眠，还控制着人们的新陈代谢。
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