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      • rebeccayen.wordpress.com
        Breaststroke蛙式, Swimming 游泳 Breaststroke Swimming with Kurt Grote蛙式分解動作 Posted by Rebecca ⋅ February 7, 2012 ... 雙臂伸直在水面下,這有助於挺起你的臀部,準備轉動身體短軸(腰臀)產生力量來驅動蛙泳動作 ...
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