她写了一本国际法的教科书。

She wrote a textbook on international law.

《柯林斯英汉双解大词典》

制作一本新教科书的成本约为100万美元。

It costs about $1 million to create a new textbook.

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一本传统的教科书可以卖到30-50美元，这可以帮助支付新学期的教科书费用。

With a traditional textbook you can sell it for $30-$50 and that helps to pay for your new semester's books.

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He now has super-human mathematical talent, can read and remember the contents of an encyclopedia volume in a few minutes, and speak a language fluently after reading one textbook.

他现在有超过人类的数学能力，能阅读,能在几分钟内记住百科全书的内容,通过阅读一本教科书就可以,流利地讲一门语言了。

哈佛公开课 - 计算机科学课程节选

Think of Star festival as a textbook that is come to life and environment where students can observe and draw their own conclusions, there is a path way to a new type of learning that is independent yet guided.

将Star，festival看作是一本教科书,走进我们的生活和环境,在那，学生们能观察,并得出自己的结论，有一条路通往学习的新形式,它独立自主，但也有所指导。

麻省理工公开课 - 媒体、教育、市场课程节选