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• 就絕對同時性,設想車廂前後兩端同時向車廂中央的立者發出光。 -cantorian- ♀ (701 bytes) () 12/18/2012 postreply 09:53:21
• 就絕對同時性,設想車廂前後兩端同時向車廂中央的立者發出光。 -cantorian- ♀ (701 bytes) () 12/18/2012 postreply 09:53:21
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