滑行最快的，是你出发后下潜，及蹬壁后的时段。
The fastest you ever travel is when you dive off the block and push off the wall.
蹬壁出发，维持在水中的深度，在水中进行旋转的动作；
Push off wall, maintaining depth, and move in a rotating motion.
戴上你最喜欢的脚蹼，双臂和身体呈流线型，蹬壁出发。
Put on your favorite pair of fins and push off on your back with arms in streamline.
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