Accordingly, since nothing prevents the earth from moving, I suggest that we should now consider also whether several motions suit it, so that it can be regarded as one of the planets. For, it is not the center of all the revolutions.

-- Nicolaus Copernicus 哥白尼

因此，既然没有什么能阻止地球运动，我建议我们现在也应该考虑几个运动是否适合它，这样它就可以被看作是行星之一。因为，它不是所有革命的中心。

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Planets Motions

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I simply haven't the nerve to imagine a being, a force, a cause which keeps the planets revolving in their orbits and then suddenly stops in order to give me a bicycle with three speeds.

我只是没有勇气去想象一个存在，一个力，一个使行星在轨道上旋转的原因，然后为了给我一辆三速自行车而突然停止。

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Their toys are alive and can sometimes come to their aid, or get lost and Olie has to find them. They go to other planets. They go to the ice cream planet.

他们的玩具是活的，有时可以来帮助他们，或迷路，奥利必须找到他们。他们去了其他星球。他们去了冰淇淋星球。

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For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study.

因为天文学家有责任通过仔细而专业的研究来撰写天体运动的历史。

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