英语语言学教程（胡壮麟版）Chapter one. Invitation to Linguistic. 1. What is language?“Language is system of arbitrary vocal symbols used for human communication. It is a system, since linguistic elements are arranged systematically, rather than randomly. Arbitrary, in the sense that there is usually no intrinsic connection between a work (like “book”) and the object it refers to. This explains and is explained by the fact that different languages have different “books”: “book” in English, “livre” in F
