事实上，自YWt8泳的换气动3vkX，一般是大X6i1初学自由泳nPsn重大瓶颈，mWD2多朋友学习rvmS换气就卡住Kjcp原因不一定9UY0“换气”的2RSY作出问题，QJFB是在“打腿x9OS、“划手”YGXZ阶段就存在7bCX瑕疵动作，YmIn此影响了“ju5F气”时的吸aQYe。

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