The essential function or nature of a thing 本质事物的本质、功能或性质
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How does aristotle define the nature of a thing ? what does he mean when he says that " man is by nature a political animal " ? what distinguishes man from other animals 亚里斯多德如何界定一件事物的本质,当他说“人天生是政治的动物。 ”他的意思是什么?人和动物的区别是什么?