dolphin kick meaning in English

海豚式打水
海豚式打腿

The dolphin kick features both legs moving up and down together . no flutter kicking is allowed
海豚式打腿的特色是两腿同时向上和向下运动。不允许采用交替式打腿。
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。
The kick is a simultaneous thrust of the legs called a " frog " or breaststroke kick . no flutter or dolphin kicking is allowed
蹬腿就是两条腿同时蹬出，称之为“蛙”式腿或蛙泳腿，蹬腿时采用交替式打水或海豚式都是不允许的。
Effective dolphin kicking is done with relaxed ankles which pull the water and provide a point of balance and leverage for the swimmer
放松的踝关节是高效的海豚踢的关键，让泳者报纸(笔误:可能是保持.老水耗子)平衡并给予发力点。