2Bardovi-Harlig, K. A.1992. second look at T-umt analysis: Reconsidering the sentence[J]. TESOL Quarterly, (26) : 390-395.
3Ortega, L. 2003.Syntactic complexity measures and their relationship to L2 proficiency:A research synthesis of college-level L2 writing[J]. Applied Linguistics, (4) .. 492-518.
4Polio, C.G. 1997.Measures of Linguistic Accuracy in Second Language Writing Research[J]. Language Learning, (47) : 101-143.
5Wolfe-Quintero,K.Inagaki,S&Kim, H.Y. 1998. Second Language Development in Writing: Measures of Fluency,Accuracy, and Complexity [M]. Honolulu: University of Hawaii, Second Lan- guage Teaching and Curriculum Center.
