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¥H«C¡B¥Õ¡B¬õ¡B¶Â¥|ºØÃC¦â©MÀs¡Bªê¡B³¶¡BªZ¡]Àt³D¬ÛÄñ¡^¥|²Õ°Êª«§Î¶Hªº¤Ç°t¨Óªí¥Ü¡A
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¤W¹Ï®i¥Üªº¬O³o¤ºØ¥¿¦h±Åé¡A«á¨Ó³Q¼Ú´X¨½¼w¡]Euclid, ¬ù 300 BC., ³QºÙ¬°´X¦ó¾Ç¤§¤÷¡^
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