They power a blade in the water that the pilot can adjust to reduce drag.
他们在水中为一个划片供能，因此驾驶者可以调整以降低拖力。
Move the body into a straight line to reduce drag and increase core power.
将身体绷成直线会减少阻力增加核心动力。
Many of the adaptations of these fishes serve to reduce water resistance (drag).
为了减少在水中前行的阻力，这类鱼身上产生了很多适应性变化。
Many of the adaptations of these fishes serve to reduce water resistance (drag).
为了减少在水中前行的阻力，这类鱼身上产生了很多适应性变化。
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