地球一面绕太阳运行，一面绕轴自转。
As the earth travels round the sun, it turns round its own axis.
地球绕轴自转，引起昼夜的变化。名词化结构。
The rotation of the earth on its own axis causes the change from day to night.
地球绕轴自转。
近地半球总是面对地球，远地半球总是远离地球，因为月球在绕地球旋转的同时，它也在以同样的速率绕自己的轴自转。
The near side is always facing Earth and the far side is always facing away, because the moon revolves around the Earth at the same rate that it rotates on its own axis.
近地半球总是面对地球，远地半球总是远离地球，因为月球在绕地球旋转的同时，它也在以同样的速率绕自己的轴自转。
The near side is always facing Earth and the far side is always facing away, because the moon revolves around the Earth at the same rate that it rotates on its own axis.
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