7Andersen, E. S. Lexical universals of body-part terminology[A]. Greenberg, J. H. Universals of Human Language (Volume 3): Word Structure[C]. Stanford, California: Stanford University Press, 1978.
8Hopper, P. G. ＆E. C. Traugott. Grammaticalization[M].Cambridge :Cambridge University Press, 1993.
9Lakoff, G. Women, Fire and Dangerous Things: What Categories Reveal about the Mind[M]. Chicago: The University of Chicago Press, 1987.
10Lakoff, G. & M. Johnson. Metaphors We Live By[M]. Chicago:The University of Chicago Press, 1980.
