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

The first question seems easy to answer. It is but a brief self-introduction.

第一问题看似简单，无非是自我简介一下。

youdao

The first question seems easy to answer. It is but a brief self-introduction.

第一问题看似简单，无非是自我简介一下。

youdao