The episodic flow of hydrocarbon migration and all geofluid and the episodic action of crust structure are complementary to each other and mutually determined.
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.
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.