本书包括语言的社会功能、语音、语法、词义、文字和书面语、语言的接触、语言系统的发展等九章，每章都有学习目标、重点与难点-This book, including the social function of language, voice, grammar, word, text, and written, language contact, language systems, such as chapters, each chapter has learning objectives, priorities and difficult
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