The essential function or nature of a thing 本质事物的本质、功能或性质
2.
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？
