That's when it's called when it's no longer Daylight Saving Time and technically, at 2: 00 a.m. Sunday, we're supposed to set our clocks back to 1: 00 a.m. Why did we do this?

结束夏令时回到标准时的具体时间是，周日凌晨两点，到那时我们就要把时间拨回到凌晨1点，但是为什么要么做呢？

Central Standard Time, two o'clock Eastern Standard Time, some thirty-eight minutes ago.

中央标准时间，东部标准时间2点，大约38分钟前。”

But one thing that's kept us springing ahead and falling back every year is the fact that there's been no agreement yet which time to choose year round -- Standard Time or Daylight Saving Time?

但全采用夏令时还是标准时间的问题一直未达成共识，也是我们每都要调快调慢时间的一个原因。

Importantly, states are allowed to exempt themselves and stay on standard time – like Arizona and Hawaii do – but more on this law later.

重要的是，各州可以免除自己的责任，并使用标准时间——就像亚利桑那州夏威夷州一样——但项法律将在以后进行更多的讨论。

Does their state stay on standard time year around?

他们的州一四季都采用标准时间吗？

On the first Sunday in November, we change our clock at 2: 00 a.m. again, that's actually just going back to Standard Time.

在十一的第一个星期天，我们再次在凌晨2点改变时钟，实际上只是回到了标准时间。

This reportedly leads to all kinds of health problems. If the time changes stay though, experts say we can ease the transition by gradually adjusting our sleep schedules before falling back or springing forward.

据报道，导致了各种健康问题。专家表示，如果继续切换标准时间的话，可以通过逐渐调整我们的睡眠时间表来进行缓解，然后再把时间向后倒或向前倒。

Clocks around the country were synchronised and standardised, and railway time ruled.

全国各地的时钟被标准化，铁路时间得到规范化。

But that is our first topic today, the potential end of Standard Time.

不过就是我们今天的第一个话题，标准时间或将迎来终结。

The book standard revision timetable that we all implicitly get taught from a young age.

前瞻性复习时间表是我们从小被潜移默化教授的标准复习时间表。

Anais Chubukian has spent her final two years in high school preparing for standardized tests.

阿娜伊丝·褚肯花了她高中最后两的时间准备标准化考试。

Lawmakers could not agree on whether to keep standard time or permanent daylight saving time.

议员无法在保留标准时间还是永久夏令时上达成一致。

And there are a few months of studying for a standardized exam.

还有几个的学习时间 标准化考试。

Daylight saving time ends this weekend. Standard time returns at 2 a.m. Sunday morning.

周末，夏令时结束。周日凌晨两点开始，进入正常标准时间。

But working 9-5 is still the standard workday in many places.

但在许多地方，朝九晚五仍是标准的工作时间。

Britain's Royal College of Paediatrics and Child Health said the study data available was too weak to permit its experts to set any measure for the best level of screen time.

英国皇家儿科儿童健康学院表示，现有的研究数据过于薄弱，无法让专家设定最佳屏幕使用时间的标准。

If you enjoyed this, make sure that you hit that Like button and remember to come back tomorrow at 3 p. m. Eastern Standard Time, because I'll have a brand new video for you.

如果你喜欢的话，一定要赞一下，明天记得回来观看，东部标准时间下午三点。因为下期我会为你播放一段很棒的新视频。

This means that adults who get less than the recommended seven to eight hours a night-and therefore insufficient REM sleep-may be damaging their mind's ability to form strong memories.

就意味着，睡眠时间不足7-8 小时标准睡眠时间的成人无法保障充分的REM 睡眠时间，因此他们形成牢固记忆的能力有可能会受损。

Dick Hallorann's flight was called at 6: 45 A . M . , EST, and the boarding clerk held him by Gate 31, shifting his flight bag nervously from hand to hand, until the last call at 6: 55.

迪克·哈洛兰的飞机在东部标准时间早上六点四十五分广播，办理登机的柜台人员将他留在三十一号登机门，他神经紧张地将旅行手提包从只手换到另一只手，直到六点五十五分的最后登机通知响起。

It announced that the new entry period will begin at noon, U.S. Eastern Daylight Time on Wednesday October 18, 2017 and will run until noon Eastern Standard Time on Wednesday November 22, 2017.

该机构还宣布“新的申请期将于美国东部夏令时间20171018日周三正午开放，并于美国东部标准时间20171122日周三正午截止。”