单腿蛙泳练习历来是世界级优秀蛙泳选手的最爱。

Single-Leg Kick has been a favorite drill of some of the world's greatest breaststrokers.

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你将跟几位世界级的运动员竞争，所以你应该努力练习。

You will be in competition with some world class sportsmen , so you should practice hard.

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每天重复练习，而后进入二级训练。

Repeat a few times per day. Go to Grade II Treatment.

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每天重复练习，而后进入二级训练。

Repeat a few times per day. Go to Grade II Treatment.

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