Yes.Only estimat,we don't know the time,it has relation with the

来源: jinjing 于 2011-08-15 16:33:51 [] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)
回答: 0.4%? 由 贫论员 于 2011-08-15 12:07:10

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• It has relation with the rotation of the Earth. -jinjing- ♀ 给 jinjing 发送悄悄话 (0 bytes) () 08/15/2011 postreply 16:50:46

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