In “Ma Shi Wen Tong”,“You,Ruo,Ru”were classified as different parts of speech such of Tongdongzi, Zhuangzi and Duanci.
《马氏文通》把“犹、若、如”归为同动字、状字、断词等不同的字类。
The tenets of historical materialism on fundamental social contradictions form the theory of social dynamics corresponding to the principle of coordinating dynamics.