The earth doesn't move round in empty space.
地球并不是处在空无一物的空间中运行。
The teacher said that all the planets move round the sun.
老师说所有的行星都是围绕太阳运转的。
In the solar system all heavenly bodies, not except comets, move round the sun.
在太阳系里,包括彗星在内所有天体都绕日旋转。
In the solar system all heavenly bodies, not except comets, move round the sun.
在太阳系里,包括彗星在内所有天体都绕日旋转。
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