4Laufer B , I. S. P. Nation. "Vocabulary Size and Use: Lexical Richness in L2 Written Production" [ J ]. Applied Lin- guistics 3: 307- 22, 1995.
5Woolard, G. "Collocation -Encouraging Learner Independence" [A]. In M. Lewis (ed.), Teaching Collocation [C]. Hove: Language Teaching Publications, 2000.
2Yoshida, M. 1978. The acquisition of English vocabulary by a japanese-speaking child [A]. In E. M. Hatch (ed.). Second Language Acquisition [C]. Rowley, MA: Newbury House.
3Lenko-Szymanska, A. 2002b. Lexieal problem areas in the ad vanced learner corpus of written data [R]. Paper presented to the 2002 SLVA Colloquium.
4Mitton, R. 1996. English Spelling and the Computer [M]. London/New York. Longmsn.
5Nation, I, S. P. 1990. Teaching and Learning Vocabulary [M]. Victoria University of Wellington: English Language Institute.
6Palmberg, R. 1987. Patterns of vocabulary development in foreign language learners [J]. Studies in Second Language Acquisition 9: 201-220.
7Read, J. 2000. Assessing Vocabulary [M]. Cambridge: CUP.
8Schmitt, N. 1998. Tracking the incremental acquisition of second language vocabulary: A longitudinal study [J].Language Learning 48:281-317.
9Sehmitt, N. & P. Meara. 1997. Re.searching vocabulary through a word knowledge framework: Word associations and verbal suffixes [J]. Studies in Second Language Acquisition 19: 17-36.
10Yang, S. D. 2000. The Vocabulary Development in Chinese EFL Students [D]. Unpublished MA Thesis. Luoyang: The PLA University of Foreign Languages.
