这是一种被称为睡眠类型的昼夜节律的良性变化。
This is a benign variation within circadian rhythms known as a chronotype.
这种以近似于——但不完全是——一天为周期的节律，叫做昼夜节律。
Such a rhythm whose period is approximately—but not exactly—a day is called circadian.
女性的昼夜节律比男性的快。
生物钟是中央昼夜节律机制。
Circadian clocks are the central mechanisms that drive circadian rhythms.
高血压患者昼夜节律对心脏结构和功能的影响。
Influence of circadian rhythm on cardiac structure and function in patients with essential hypertension.
换句话说，至少对于人类来说，昼夜节律不完全是遗传问题。
In other words, at least for humans, circadian rhythm is not entirely a matter of genetics.
一个叫Yan的人解释了存在于睡眠和昼夜节律背后的科学。
But what I was watching seemed different. A man named Yan was explaining the science behind sleep and the circadian rhythm.
研究者表明，这是由于我们的自然睡眠-觉醒周期或者昼夜节律的影响。
This could be due to the effects of our natural sleep-wake cycle, or circadian rhythm, the researchers suggest.
结果显示鼾症组夜间血压较白昼无明显降低，昼夜节律消失。
It was found that blood pressure of the snoring group did not decrease in the nighttime (non-dipper).
所有的这些周期被人们统称为昼夜节律，一般以24小时一昼夜为一个循环。
Collectively, these cycles are known as circadian rhythms and are generally tied to the 24-hour day-night cycle.
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.
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.
当我们睡觉，睡眠长，通过系统的昼夜节律调节和自我平衡的系统管理。
When we sleep, sleep long, by regulation of circadian rhythm system and self-balancing system management.
遗传学家们目前确定了一系列基因，这些基因能够调节scn和哺乳动物的昼夜节律。
Geneticists have by now identified a set of genes that regulate the SCN and thus the circadian rhythm among mammals.
交通运输对皮质醇浓度的影响，以及小母猪的皮质醇因为昼夜节律的影响。
Effect of transportation on cortisol concentrations and on the circadian rhythm of cortisol in gilts.
虽然在昼夜节律中，人与人具有个体差异，但人类基本上都是在白天活动的。
While there are some individual differences in the circadian rhythm, where some individuals are more nocturnal than others, humans are basically a diurnal (day-living) species.
即便是街灯、满月，或者邻居家传来的微弱光线，也能干扰入睡所需的昼夜节律变化。
Even the barely noticeable ambient light from streetlights, a full moon, or your neighbor's house can interfere with the circadian rhythm changes you need to fall asleep.
昼夜节律是人体的内在时间跟踪系统，预计环境变化和适应每天合适的时间。
Circadian rhythms are the body's intrinsic time-tracking system, which anticipates environmental changes and ADAPTS to the appropriate time of day.
哺乳动物中调节昼夜节律的是两个调节神经细胞群，称为视交叉上核中的下丘脑。
The circadian rhythm in mammals is regulated by two clusters of nerve cells called the suprachiasmatic nuclei (SCN) in the anterior hypothalamus.
褪黑激素，黑暗时松果腺产生的一种激素，被认为在控制身体昼夜节律起主要作用。
Melatonin, a hormone produced by the pineal gland in response to darkness, is thought to play a primary role in controlling the body's circadian rhythm.
科学家们曾认为昼夜节律的调节是受基因活动支配，但海藻和红细胞中都不含DNA。
Scientists had previously thought the circadian clock was driven by gene activity, but both the algae and the red blood cells kept time without it.
缺乏光照有可能破坏你的醒睡周期和昼夜节律，还可能改变一种叫血清素的脑化学物质进而影响情绪。
Lack of light may upset your sleep-wake cycle and other circadian rhythms. And it may cause problems with a brain chemical called serotonin that affects mood.
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.
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.
自身节律的个人差异对季节性抑郁症的治疗有重要意义。这类患者接受光照疗法以重设昼夜节律。
This difference is important for people with seasonal depression, who are treated with light therapy to reset their circadian rhythm.
几乎自然界中所有的物种，从单细胞生物到哺乳动物(包括人类)，都具有一种日常活动周期，称为昼夜节律。
Virtually all species in nature, from single-cell organisms to mammals, including humans, exhibit a daily cycle of activity called circadian rhythm.
几乎自然界中所有的物种，从单细胞生物到哺乳动物(包括人类)，都具有一种日常活动周期，称为昼夜节律。
Virtually all species in nature, from single-cell organisms to mammals, including humans, exhibit a daily cycle of activity called circadian rhythm.
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