The butterfly stroke is similar to freestyle except that the arms circle together symmetrically and hence the body movement is more dolphin like.
蝶泳类似于自由泳，但它需要双臂一同划圈，这样身体的运动更像海豚。
The most physically demanding stroke, the butterfly features the simultaneous overhead stroke of the arms combined with the dolphin kick.
对身体条件最苛求的泳姿，蝶泳的特色是两臂同时越过头顶结合海豚式打腿。
I know there are freestyle, back-stroke, breast-stroke, butterfly and dolphin stroke.
我知道有自由泳，仰泳，蛙泳还有海豚泳。
I know there are freestyle, back-stroke, breast-stroke, butterfly and dolphin.
我知道有自由泳、仰泳、蛙泳还有海豚泳。
Butterfly: a stroke made in the prone position where both arms are lifted simultaneously out of the water and flung forward, in combination with the dolphin kick.
蝶泳：一种泳姿。即采用俯卧姿势，双臂同时在水面之上前挥划水，结合身体做海豚式打水。
Butterfly: a stroke made in the prone position where both arms are lifted simultaneously out of the water and flung forward, in combination with the dolphin kick.
蝶泳：一种泳姿。即采用俯卧姿势，双臂同时在水面之上前挥划水，结合身体做海豚式打水。
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