当有人间:“鸟有什么本领?”小朋友一定会很快地回答:“鸟会飞呀!”假若再问:“是不是所有的鸟都会飞呢?”小朋友也许仍会肯定地回答:“那当然啦!”其实,并不是所有的鸟都会飞的。比如,生活在南极的企鹅就不会飞,它被称为鸟中的胖子,由于企鹅有大半的时间在海里游泳,为了适应环境,企鹅的翅膀就逐渐演变成像船桨一样的前肢,慢慢地就失去了在空中飞翔的能力。 When there is a human being: “What is the abilities of the bird?” The little friend must be quick to answer: “The bird will fly!” If you ask again: “Is not all the birds flying?” Children may still answer with affirmative answers: Of course! "Actually, not all the birds will fly. For example, a penguin living in the Antarctic will not fly, it is called the fat bird, because most of the time the penguins swim in the sea, in order to adapt to the environment, the penguin’s wings gradually evolved into a paddle-like forelimb, slowly Land lost the ability to fly in the air.