看板Physics
标 题Re: What is Gravity? Why/How does it work?
发信站(null) (Wed Sep 12 12:25:58 2007)
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This
https://www.youtube.com/watch?v=VCIyzNISw1Q
1F：推 HLiNaKRbCsFr:看完了 你是来乱的吗？ 09/12 12:58