三十亿年前，月亮离地球太远了，不能对地球上的石头产生什么影响，但它却对海洋产生了作用。
Three billion years ago, the moon was too far away to have a dramatic effect on the rocks of the Earth, but the moon did affect the oceans.
海洋潮汐被创立在引力效应的月亮和太阳在地球上。
Ocean tides are created by the gravitational effects of the moon and sun on the Earth.
海洋潮汐被创立在引力效应的月亮和太阳在地球上。
Ocean tides are created by the gravitational effects of the moon and sun on the Earth.
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