The mirrors could orbit—thousands of miles high—at the same speed as the earth turns on its axis.

这些镜子可以在几千英里的高空以地球绕地轴旋转的速度运行。

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Nuclear bombs are humankind's most powerful weapon, but their destructive impact would unlikely alter the spinning of the Earth on its axis.

核弹是人类最强大的武器，但是它们的破坏性影响还不大可能改变地球沿着其轴线的自转。

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An earthquake can make earth rotate faster by nudging some of its mass closer to the planet's axis, just as ice skaters can speed up their spins by pulling in their arms.

一次地震可以使地球旋转得更快，通过将地球的质量向它的轴线轻推，正如滑冰的人可以通过缩回他们的手臂来使旋转加速。

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Other that it is all natural caused by changes in solar activity, the angle of the axis of the earth, something, anything, and now cosmic rays and the formation of Aitken nuclei.

FORBES: "Climategate" Scientists Cleared of Wrongdoing - Again

The Geographic pole is the top of the axis on which the earth spins, the Magnetic pole is where the compass points to, and the Arctic pole is the point on the Arctic Ocean furthest from any land.

BBC: NEWS | UK | British man scores polar success

The Geomagnetic pole is the north end of the axis of the geomagnetic field which surrounds the Earth and extends into space as the magnetosphere.

BBC: NEWS | UK | British man scores polar success