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动物大家庭的成员有多少？动物家庭成员的数目，是随着人们动物学知识的积累逐渐增加的。早在公元前3世纪，古希腊科学之父亚里斯多德认为动物家庭成员有450种；18世纪初，第一个动植物分类学家林奈认为有4000种；19世纪初又有人作出统计：动物家庭成员一共有4.8万种；到19世纪
How many members of the animal family? The number of animal family members is gradually increasing as people’s zoology knowledge accumulates. As early as the third century BC, Aristotle, the father of ancient Greek science, believed that there were 450 members of the animal family. In the early 18th century, Linnaeus, the first animal and plant taxonomologist, believed that there were 4,000 species; at the beginning of the 19th century, statistics were made. : A total of 48,000 animal family members; to the 19th century