6.The episodic flow of hydrocarbon migration and all geofluid and the episodic action of crust structure are complementary to each other and mutually determined.
7.A semicomplete multipartite digraph is obtained by replacing each edge of a complete multipartite graph by an arc or by a pair of two mutually opposite arcs.
8.The overall development of human being and the construction of socialist harmonious society interdepend and mutually reinforce, both in theory and practice to a high degree of uniformity.