马克思是社会交往理论的创立者，他对人类社会交往的类型即内部交往、外部交往和世界交往作了广泛研究。
The founder of the social association theory, Marx researched all kinds of the society association patterns widely, such as inner association, outside association and the world association.
马克思是社会交往理论的创立者，他对人类社会交往的类型即内部交往、外部交往和世界交往作了广泛研究。
The founder of the social association theory, Marx researched all kinds of the society association patterns widely, such as inner association, outside association and the world association.
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