冥河之泳:获得游泳速度和水下呼吸能力。
Swimming the Styx: Gain swim speed and ability to breathe water.
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。
You can use a dolphin kick for either freestyle or butterfly, but for the start, remember to use a smaller, faster dolphin kick.
对于每种泳姿而言,400米个人混合泳需要的不仅仅是力量和速度,同时耐力也是至关重要的。
The 400 IM not only requires strength and speed in all four strokes, but also tremendous endurance.
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