前言介绍了沃克的文学创作概况，包括其文学地位、主要作品、创作前后分期的主题侧重及她对美国文学三方面的特殊贡献。
The introduction gives a survey of Walker's literary creation including her literature status, main works, varied emphasis in different periods, and her special contribution to American literature.
本文前言介绍考证的缘起、采取的方式及意义；
The Preface is about the origin, methods and meaning of the research.
前言介绍了我国研究小额诉讼程序的社会背景及意义。
The foreword introduces the social background and the significance to study small claims procedure in our country.
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