introductory

adj.

引导的，介绍的，导言的；开端的；序；

introductory course基础入门课程

introductory remarks开场白；引言

1. The first paragraph of the body is introductory.
   正文的第一段往往具有介绍的特点。
2. This book includes a good introductory chapter on forests.
   这本书有一章关于森林的很好的序篇。
3. I would consider this introductory text a success.
   我将认为这本导引性的教科书是成功的。
4. She made a few introductory remarks.
   她讲了几句开场白。
5. He got a pass in introductory chemistry.
   他的入门化学课程考试及格了。

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