The author points out the basic principle subordinated to structure reconstruction: the principle of simplicity,to be more specific,it is in accordance with the principle of integration,the principle of copying,and the principle of constraint.

As to the study of child language acquisition, there are there basic theories about how young children learn new words: associative theory, constraints theory and social-pragmatic theory.

Its philosophy idea and theory expectation weren\'t got further development in China,however,the structural linguistics of China made a more deep investigation and study on semantic problems of transformation than Harris,meanwhile suggested the parallel principle of transformational analysis.