课本的英文：
textbook

update a textbook;update the files.
更新课本;更新档案

This textbook is less difficult.
这册课本较不困难。

To change or falsify(a text)by introducing new or incorrect material.
篡改通过插入新的或不正当的材料改变或伪造(课本)

Prayers or religious texts
祈祷文或宗教课本

I forget to bring my textbook.
我忘了带课本。

Open your text-books to Page 10.
打开课本第10页

Each student was issued with a textbook.
每个学生发了一本课本。

This is the boy whose textbook was lost.
这就是丢失课本的孩子。

This textBook has twenty lessons.
这课本有二十课。

The school labors under the disadvantage of not having enough textbooks
这所学校苦于课本不足的不利条件。

a graduated series of textbooks
分等级的教科书系列

A part of the textbooks have arrived.
一小部分教科书已经运到了。

Lectures work in tandem with the textbook.
授课与教科书的作用互相串联。

This textbook consists of 18 chapters.
这本教材包含18章。

Our textbook has many figures to help explain the lessons.
我们的教科书有许多图表帮助解释课文。