Even without morning light, their circadian rhythms told them when dawn should be breaking.

即使没有晨光，它们的物钟也会告诉它们什么时候天亮。

But not everyone's circadian rhythm is the same.

但每个人的律不一定是一样的。

The cells, called ipRGCs, are responsible for regulating circadian rhythms.

这些叫做ipRGCs的细胞负责调律。

If you'll remember earlier in the video, I talked about how the circadian rhythm is, for the most part, endogenously, I think that's how you pronounce it.

视频前面有讲过，物钟的问题，多数情况下内源代谢，我觉得是这么发音。

And social jet lag is taking its toll on the night owls of the world because even if you get the recommended amount of sleep, knocking your circadian rhythm out of wack has consequences.

社会时差发在世界上的猫子们身上，因为即使得到了充足的睡眠量，从律中被唤醒也会产相的后果。

Sleep is regulated by your circadian rhythm, or body clock, located in the brain.

睡眠由脑内的律或理时钟所管理。

Blind people who have some light perception are able to synchronise their circadian rhythms to the light-dark cycle.

一些具有光感的盲人可以依据循环来同步他们的律。

Your circadian rhythm, which governs your sleep and wake cycle, is the best example – but it also applies on the smaller scale as well.

控制睡眠和醒来周期的律是最好的例子——但它也适用较小的方面。

Efforts to alter your circadian rhythm are likely to end in sleepy frustration.

试图改变你的律可能会以困倦和沮丧告终。

And your circadian rhythm can get sort of messed up very quickly.

律很容易被打乱。

This is the first time that the circadian clock within individual cells has been shown to determine how effectively they respond to injuries, he said.

他说，“这项研究首次显示出，个体细胞内的律能够对伤口作出有效反映”。

Giles Duffield, a biologist at the University of Notre Dame, who studies circadian rhythms.

圣母大学研究律的物学家贾尔斯·达菲尔德说到。

That's because light suppresses melatonin, a hormone that plays an important role in circadian rhythm.

这是因为光抑制褪黑激素，褪黑激素在律中起着重要作用。

Their light at night can affect our internal clocks, or circadian rhythm.

它们在间发出的光会影响我们的物钟，或者说律。

Sofia Axelrod studies circadian rhythms at Rockefeller University in New York.

索菲亚·阿克塞尔罗德在纽约洛克菲勒大学研究律。

It may be most useful for people who have abnormal or disrupted circadian rhythms — like people with jet-lag, night shifts, or a condition called delayed sleep phase syndrome, which is when your biological clock is perpetually several hours behind.

它可能对律异常或紊乱的人最有用，比如时差、班或被称为睡眠阶段延迟综合症的人，这种综合症是指你的物钟永远落后几个小时。

On Earth, our bodies respond through circadian rhythms to the Sun rising and setting to help us sleep, but astronauts on board the International Space Station see 16 sunsets and sunrises every day.

在地球上，我们的身体通过律对太阳的升起和落下做出反，帮助我们入睡，但国际空间站上的宇航员每天都能看到 16 次日落和日出。

Biology — circadian rhythms — likely also play a part; people tend to be at their most alert at the start of the day, and would therefore be satisfied with a meal choice that they don't have to think about too much.

物学——律——也可能发挥作用；人们往往在一天开始时处最警觉的状态，因此会对他们不必考虑太多的餐食选择感到满意。

Some doctors even say the clock change isn't healthy and can cause headaches in some of us by affecting the hypothalamus in the brain, The part that manages our circadian rhythm.

有些医甚至说，时钟变化不利人体健康，这会影响大脑中的下丘脑，从而导致某些人头痛。这是控制我们律的部分。

In the fall of 2015, Seattle public schools announced that it would change the school starting time from 7: 50 AM to 8: 45 - to adapt to the circadian rhythm of teenagers.

2015年秋季，西雅图公立学校宣布将把上课时间从早上7: 50改为8: 45，以适青少年的律。