I think at the beginning of each book a brief introduction to it is necessary.

我认为每本书开头的简短介绍都是很有必要的。

youdao

I see this as a course that's an introduction to the literature of a period, to modern poetry.

我认为这是一门关于某个时期的文学和现代诗歌的入门课程。

youdao

This paper includes the following sections: Part I, Introduction.

本论文主要包括以下几个部分：第一部分，绪论。

youdao

And they are free. "Introduction to Trigonometry is where I teach people about the trig functions."

VOA: standard.2010.03.26

I see this as a course that's an introduction to the literature of a period, to modern poetry.

我觉得，这只是一门引导性课程,引导大家关注某一时期的文学创作和现代诗歌。

耶鲁公开课 - 现代诗歌课程节选

It's in this light that the introduction, I think, of Galileo in this simile starts to make a little more sense.

就此而论，这个比喻中，关于伽利略的介绍开始有了点意义。

耶鲁公开课 - 弥尔顿课程节选

Thank you, Bob, I appreciate the introduction and I'm very pleased to have the opportunity to address the council.

CENTERFORSECURITYPOLICY: Remarks to the Council on Foreign Relations

" Well, he came to the dais and said, "it may be true that I need no introduction, but no one enjoys one more than I do.

CENTERFORSECURITYPOLICY: Center For Security Policy

And one last introduction I want to make.

WHITEHOUSE: Winning the Future with Clean Energy