Then, kick your legs up and down together in a whipping motion generating from the hips and bending at the knees, as if you were a dolphin.
通过髋关节和膝关节用力运动，上下踢你的腿，就像海豚一样。
A whipping or lashing motion or stroke; a whiplash.
鞭打抽打，鞭打的动作或一抽、一挥；
A whipping or lashing motion or stroke; a whiplash.
鞭打抽打，鞭打的动作或一抽、一挥；
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