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千百年来,自然界的动物在严峻的生存与发展的竞争中,形成了一身独特的本领,动物中许多奇妙卓绝的结构、机能,为人类在战
For thousands of years, animals in the natural world have formed a unique skill in the fierce competition for survival and development. Many wonderful and extraordinary structures and functions in animals are at work for humans.