Still others (covered with scales) depended upon a swimming motion to go from place to place in their search for food, and gradually they populated the ocean with myriads of fishes.

• 还有一些身上覆着鳞片的细胞，它们凭借游泳似的动作四处来去，寻找食物。慢慢地，它们变成了海洋里繁若晨星的鱼类。