这些压力来自于两个方面，其一来自于亚里士多德的天堂理论，石头的下落是为了到达宇宙的中心。
From two particular directions one of them was to do with the Aristotle theory of the heavens, stones fall because they strive to reach the center of the universe.
这些压力来自于两个方面，其一来自于亚里士多德的天堂理论，石头的下落是为了到达宇宙的中心。
From two particular directions one of them was to do with the Aristotle theory of the heavens, stones fall because they strive to reach the center of the universe.
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