We often refer the butterfly kick as the body dolphin.
我们通常把蝶泳踢腿称作海豚泳。
The butterfly, the fly kick is very important, also.
在蝶泳中，打腿也非常重要。
Most important thing in learning butterfly is the kick.
学习蝶泳中最重要的一项就是打腿。
A real important part of the butterfly stroke is the under water swimming, fly kick under water.
蝶泳非常重要的组成部分是水下部分，即水下蝶泳腿。
A real important part of the butterfly stroke is the under water swimming, fly kick under water.
蝶泳非常重要的组成部分是水下部分，即水下蝶泳腿。
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