intuition testing,statistic text analysis and cross-linguistic comparison,in the investigation and research of Chinese dialectal grammar to modernize this field.

Probing into some important linguistic differences between English and Chinese,it suggests that translation teaching be conducted through highlighting linguistic contrast in language teaching.

From the ascepts of the nature,cognitive model,restriction principle and interactive relationship between metonymy and metaphor,analyzes and explains the mouth/teeth/lip/tongue-speech,discusses the national difference of mouth/teech/lip/tongue-speech by language comparison.

For the contrast of languages in bilingual field of Chinese ethnic minorities,we must do well the following points:distinguishing categories to have objects in view;macro-grasping characteristics of two contrast languages;hunting for difficult points and distinguishing easy and difficult orders;and finding bilingual characteristics from errors gotten in customs.