This essay is written to offer a concise theoretical explanation of the emergence of many versions contraposing the same source text (ST) in translation, drawing on Katan’s theory about perception filters and intercultural communication theories concerned.

Based on S-rough sets,the concepts of f-transfer knowledge,F-transfer knowledge,knowledge filter degree and knowledge filter attribute f-transfer dependence were given.

Knowledge filter is the gap between new knowledge and commercialized knowledge, which is one of reasons that there is non-liner relationship between R&D input and innovation outcome.

The system structure and main parts are studied firstly,then some key techniques concerning with implementing the cooperative design,such as the share of cooperative structure information,the share of cooperative design information and cooperative process apperception,are discussed thoroughly, and in the .

This paper discusses and analyzes how the affects w ork in the course of language acquisition and teaching, and on the basis of the analysis presents some methods to reduce the affective filter in foreign language teaching to help learners to acquire language competence.

Based on the present situation and practice of Russian teaching in China,the paper revealed the factors which cause the students affective filter during acquisition of Russian as a second foreign language,and argues the strateges and methods that reduce affective filter to help the students raising efficiency.