4个来回应该容易记住,然后换姿势-比如自由泳换蛙泳(我只会这两种)。每个姿势4个来回,然后记住换了几次姿势就行了。
4个来回应该容易记住,然后换姿势-比如自由泳换蛙泳(我只会这两种)。每个姿势4个来回,然后记住换了几次姿势就行了。
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