So that's it, these are the 11 drills to learn the body undulation and dolphin kick!
原来如此，这些都是11演习，学习身体波动和海豚踢！
You can use a dolphin kick for either freestyle or butterfly, but for the start, remember to use a smaller, faster dolphin kick.
你可以在自由泳和蝶泳(入水后)打蝶泳腿，但在刚开始的时候，一定记住蝶泳腿要做到幅度小、速度快。
The dolphin kick and body undulation exercises simply teach you how to learn the technique described above.
海豚式打腿练习和身体的波动只是教你怎么学技术前述。
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