[技巧] 蛙式的波浪式游法
Rebecca Soni during her world-record swim on Thursday (Aug. 2, 2012)
http://www.nytimes.com/2012/08/03/sports/olympics/soni-first-repeat-winner-in-swimming-franklin.html?_r=0
從網路上查詢蛙式的游法，一般可分成三種游法：flat, wave 和 undulation，請參考已下連結：
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