本书按远古世界、两栖动物等动物的进化为主线，有选择地、通俗易懂地讲述几亿年来动物的进化和物种消亡，再现当时地球的情景。（This book takes the evolution of animals like amphibians etc in ancient times as the principal line, elaborates selectively in popular and easily understood language the evolution and extinction of species in hundreds of millions of years, and reproduces the situation of the earth at that time.）
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