2021年比往年短吗?-凯发k8官网

2021年比往年短吗?
文章来源:未知 文章作者:enread 发布时间:2021-04-13 08:00 字体: [ ] 
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科学家们发现,目前地球的自转速度比过去50年来的任何时候都要快。专家们认为,2021年将会是几十年来最短的一年。不过,我们是不是应该在这一年结束前争分夺秒,抓紧时间?
 
'time waits for no man' – or so the saying goes. we can't stop time and we can't control it, although sometimes, in our minds, we think time flies – for example, when the weekend arrives, we feel it's over in no time! but if this year in particular feels like it's passing more quickly than others have done, there could be a scientific explanation why.
 
of course, we know a year is usually 365 days long. clever scientists calculated this a long time ago. they also worked out that every four years, we need an extra day to keep our calendar in sync – this is called a leap year. but 2021 isn't one of those years, and yet it's not behaving like a normal year. scientists and astrophysicists have done the math and discovered the earth is moving faster than it ever has in the last 50 years. this means that 2021 is going to be the shortest year in decades.
 
1, this is because the earth is spinning faster on its 2, quicker than it has done in decades, and the days are therefore shorter. but they are only short by a tiny amount – around 0.05 milliseconds – so don't panic if you haven't noticed! however, long-term these milliseconds add up. astrophysicist graham jones and konstantin bikos from time and date told the independent newspaper: "if the earth's 3 continues to quicken, we may at some point require a negative leap second. if this happens, our clocks would skip a second in order to keep up with the hurrying earth." since 1972, 27 leap seconds have only been added to our time and none have been taken away.
 
this really is only of concern for atomic clocks – the most accurate timekeeping devices in history. studying the earth's rotation and then subtracting or adding a leap second to these clocks can ensure they remain 4 and keep us on time. but now, maybe we need to get a move on before this 'shorter' year is gone in a split second!


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1 tmmyq     
adv.显然地;表面上,似乎
参考例句:
  • an apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • he was apparently much surprised at the news.他对那个消息显然感到十分惊异。
2 sdxyz     
n.轴,轴线,中心线;坐标轴,基准线
参考例句:
  • the earth's axis is the line between the north and south poles.地轴是南北极之间的线。
  • the axis of a circle is its diameter.圆的轴线是其直径。
3 lxmxe     
n.旋转;循环,轮流
参考例句:
  • crop rotation helps prevent soil erosion.农作物轮作有助于防止水土流失。
  • the workers in this workshop do day and night shifts in weekly rotation.这个车间的工人上白班和上夜班每周轮换一次。
4 165f93b99f87c219277d70d866425da6     
adj.对齐的,均衡的
参考例句:
  • make sure the shelf is aligned with the top of the cupboard.务必使搁架与橱柜顶端对齐。
tag标签: time year calendar
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