Electrons move round the nucleus as the earth moves round the sun.
电子绕原子核运转就像地球绕太阳运行一样。
It is the gravitation which makes the satellites move round the earth.
是地球引力使卫星绕地球运行。
Many people of that time were sure the earth never moved, and the other planets and the sun appeared to move round the earth.
当时，许多人确信地球从不运动，而其他行星和太阳似乎在围绕地球运动。
Many people of that time believed that the earth never moved, and the other planets and the sun appeared to move round the earth.
那时有许多人确认地球绝不运动，而其他行星和太阳似乎围绕地球运行。
Many people of that time believed that the earth never moved, and the other planets and the sun appeared to move round the earth.
那时有许多人确认地球绝不运动，而其他行星和太阳似乎围绕地球运行。
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