单词frog kick
na.: 【体】蛙泳的蹬夹动作网络: 蛙泳蹬腿；蛙式；蛙踢
【体育】蛙泳的蹬夹动作
蛙式噔腿
Discussion on Frog kick in Breaststroke Training of the Beginners
对初学者蛙泳腿教学法的探讨