4Lakoff,G & Johnson,J.Netaphors We Live by[M].Chicago:University of Chicago Press,1980.
5Laufer,B.(1997).What's in a word that makes it hard or easy:Some intralexical factors that affect the learning of words.In N.Schmitt & M.McCarthy(Ed.).Vocabulary Description,Acquisition and Pedagogy(pp.140-155).Cambridge:Cambridge University Press.
