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4Joseph Greenberg, "Some universals of grammar with particular reference to the order of meaningful dements," in Universals of Language, Cambridge: MIT Press, pp. 73-113,p. 22. 被引量：1
5Rod Ellis, The Study of Second Language Acquisition. Oxford:Oxford University Press, 1994. 被引量：1
6Talmy Givon, “Isomorphism and Grammatical Code: Cognitive and Biological Considerations”, in R Simone ed. Iconicity in Language, Amsterdam: Benjamin.s, 1995, pp. 47 - 76. 被引量：1
7George Kingsley Zipf, Selected Studies of the Principle of Relative Frequency in Language, Harvard University Press, 1932. 被引量：1
