This paper aims at introducing the relation between intensional logic and substitutional failure in intensional context,and trying to explain the limitation of extensional logic.

We try to expurgate the concept, and furthermore, put forward "inside world" parameter, and indicate that it should be in the frame of intensional logic to describe Chinese quasi-contradictory sentences.

Based on the intensional logic theory, absorbing the delicacy of traditional Chinese lexicology.

This paper endeavors to integrate the four logical connotations of Marxian Theories on Interest-bearing Capital, namely, theories on the integrativeness of interest-bearing capital, theories on capitalist credit, theories on Fictitious Capital and theories on subsequences of credit system construction.

To explore the logical connotation of knowledge so that a sound cognitive structure can be made;to explore the idealogical connotation of the teaching material so that the methods of mathematical thoughts expressed implicitly in the textbook can be made dominant;to explore the humanistic connotation of the teaching materials so that the education of students\' human spirit can get strenghtened.