5Izumi, S. Comprehension and production processes in second language learning: In search of the psycho- linguistic rationale of the output hypothesis [J ]. Applied Linguistics, 2003 (24): 168-196.
6Long, M. Focus on form: A design feature in language teaching methodology [A]. In Bot, K., Ginsberg, R. & Kramsch, C. (Ed.), Foreign Language Research in Cross- cultural Perspective [C]. Amsterdam: John Benjamins, 1991.
7Swain, M. Communicative competence: Some roles of comprehensible input and comprehensible output in its development [A]. In Gass, S. & Madden, C. (Ed.), Inputin Second Language Acquisition [C]. Rowley: Newbury House, 1985.
8Swain, M. Three functions of output in second language leanaing [A]. In Gook, G. & Seidlhofer, B. (Ed.), Principles and Practice in Applied Linguistics: Studies in Honor of H. G. Widdowson [C]. Oxford: Oxford University Press, 1995.
9Thomas, A. Language teacher competence and language teacher education [ A ]. In Bowers, R. (Ed.), LanguageTeacher Education: An Integrated Programme ./'or ELT Teacher Training [C]. London: British Council, Modern English Publications, 1987.
