海豹的鳍肢与人类的手臂同源。The seal's flipper is homologous with the human arm.鲸 、 海豹, 企鹅和海龟均有鳍形肢.Whales, seals, penguins, and turtles have flippers.他在她胸肢带骨的变形周线间漫步.He walked among the displaced contours of her pectoral girdle....

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“肢”的拼音为：zhī...