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　　While continuing to keep each chapter independent to allow maximum flexibility for teaching and learning, the ninth edition of Language Files has improved the organization within each chapter by adding an introduction file at the beginning. The introduction file provides an overview of the subfield of linguistics to be studied, as well as the specific topics to be discussed.

　　To make the book more interesting and to help students better understand the content, this new edition is enriched with visual illustrations such as cartoons, drawings, real life pictures, and schematic representation of examples, in addition to the figures and charts in the past editions. New exercises and suggested further readings are added in many chapters. Answers to the exercises are available at the back of the book and on-line for teachers and students.

　　本書為當前最受歡迎的「語言學入門」教材。由美國俄亥俄州立大學語言研究所師生所共同編寫語言學基本知識大全，旨在介紹有關語言學的各種基本觀念、知識和分析方法，不但行文清楚簡單，並佐以豐富的範例、圖表和練習，使讀者在實例中充分掌握語言學的理論與分析技巧。