The sun's emissions of UV light are not uniform, so as it rotates UV-bright regions move in and out of view of Earth.

太阳所发出的紫外光是不统一的，所以由于太阳的自转地球所吸收的紫外光的数量也就不同。

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The Dark Twin may even move ahead of the Earth, temporarily, before being squeezed out of the cup to escape.

黑暗双星在被挤出杯外之前甚至会暂时移动到地球前面。

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So I think, one day in the world the earth will move, then I can be raised out of the hole.

我便想，世界上有一天会地壳活动，我就能被托出地面了。

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One day this information could be used to help move an asteroid out of an Earth-impacting orbit.

CNN: Meteor shows why it is crucial to keep an eye on the sky

Also, spacecraft stationed at L2 do not experience the swings in temperature that objects circling close to Earth sometimes undergo as they move in and out of shadow.

BBC: Telescopes given 'go' for launch

This gives the dinosaur-killing rock only 15 million years to move into a suitable place to be flung out of the main belt and to travel to Earth in time for the impact 65 million years ago.

BBC: Asteroid thought to kill dinosaurs may not be guilty