dolphin kick

基本解释

Interstingly, the butterfly kick was developed separately, and is also known as the "dolphin kick".
有趣的是，蝶泳的踢水動作是單獨發展出來的，而且被叫做“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（入水後）打蝶泳腿，但在剛開始的時候，一定記住蝶泳腿要做到幅度小、速度快。
To swim butterfly correctly it is important to have mastered the body undulation and dolphin kick first before adding the arm movement.
遊泳是很重要的蝴蝶正確掌握身躰的海豚式打腿前、巖麪起伏及其裸露程度增加臂的運動。