精选优质文档-倾情为你奉上第一章1.What is language?Language is a system of arbitrary vocal symbols used for human communication2.Design features of languageArbitrariness(任意性)refers to the forms of linguistic signs bear no natural relationship to their meaning. (sounds and meanings)Duality（二层性）:The property of having two levels of structures, such that units of the primary level are composed of elements of the secondary level and each of the two levels has its own principles of organization.
