Arguing for an approach to sentence meaning by way of synthesizing logic, semantics and syntax, the authors elicit the theory of reference and the logic-syntax theory and compare the types of reference in the three languages.

Arguing an approach to sentence meaning by way of synthesizing logic, semantics and syntax, the authors depend on the theory of reference and logic-syntax theory and compare the types of reference in the three languages.

The optic elastic effect of optic material,the interference theory of linear polarization light and the characteristics of the manometers for production logging are analyzed to design a new type of downhole photoelectric manometer.

From the angle of reliability, the system of coal cutting and support moving of high productivity and efficiency work face is analyzed in detail by using the interference theory of strength and stress distribution.

Finally,according to sphere theory and interferential theory,the phenomena that the theoretical density is maximum when the test index is 0.

The propagation properties of the bottle beam were described based on geometrical optical theory,interferential theory and diffraction theory.

But in the case of philology and philological education per se,"theoretical journey" is undoubtedly the great momentum to promote the teaching material development.

The design system of multilevel dense built-in gradation(MDBG) consisting of coarse skeleton structure and fine skeleton structure was presented on the stage filling theory and particle interfering theory as design basis and the Bailey method as test criterion.

By studying the maximum density curve theory,particle interfering theory and different grading calculus,the varying i method and calculating formula were put forward to grading design.