尾巴，对于一些动物起着重要的作用。鸟儿有了尾巴，可以在蔚蓝的天空上掌握平衡，自由的翱翔；鱼儿有了尾巴，可以自由自在的探索海洋的奥秘；孔雀有了尾巴，可以炫耀一身华丽的花衣；马儿有了尾巴，可以打去落在自己身上顽皮打闹的虫子。有人会问：“人怎么没有尾巴？假如人 The tail plays an important role for some animals. With the tails, the birds can master the balance on the blue sky and fly freely; the fish has a tail and can freely explore the mysteries of the sea; the peacock has a tail and can show off a gorgeous floral dress; the horse has Tail, you can hit the bugs that fall on yourself. Some people will ask: "How do people have no tails? If people