海豚是什么?是有非凡智慧的动物?是善良可爱的吉祥物?是拯救落水海员的英雄?还是帮助脑瘫患儿康复的良医?无疑,海豚是世界上最受欢迎的动物,在人们眼中,它们聪明、友好、温顺。可是自然界中的事实常常有悖于我们的想象。最近,科学家发现,海豚会无端攻击其他鲸类,甚至是小海豚。而一些期 What are the dolphins? Are they animals of extraordinary wisdom? Are they kind and lovely mascots? Are they heroes to save the seamen? Are they good doctors who help children with cerebral palsy? No doubt, dolphins are the most popular animals in the world and they are in the eyes of people. They are smart, friendly and docile. However, facts in nature are often contrary to our imagination. Recently, scientists have discovered that dolphins will unprovokedly attack other cetaceans, even small dolphins. And some periods