前言是引言,要写出作本文的背景,引导读者进一步理解本文。所以,前言应包括:①课题意义,③国内、外有关研究概况,③研究目的,④研究材料和方法,⑤研究内容。在杂志所要求的250个字内,要写清五个方面的内容,似乎有一定的困难。因此,必须抓住“研究目的”这个主题。“研究目的”如补缺、补全、积累资料等等,用语无须很 Foreword is an introduction, to write the background for this article, to guide readers to further understand this article. Therefore, the preface should include: ① the significance of the topic, ③ domestic and foreign research profiles, ③ research purposes, ④ research materials and methods, and ⑤ research content. Within the 250 words required by the magazine, there seems to be some difficulty in writing about the five aspects. Therefore, we must seize the “research purpose” this theme. “Research purposes” such as filling vacancies, make up, accumulate information, etc., the language need not be very