海豹的鳍肢与人类的手臂同源。The seal's flipper is homologous with the human arm.我们可以看到鱼把鳍露出水面.Fish could be sighted finning near the surface.鲸 、 海豹, 企鹅和海龟均有鳍形肢.Whales, seals, penguins, and turtles have flippers....
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。The police said their suspicions were aroused because Mr Owens had other marks on his body...警方说欧文斯...