5 sentences

1. 他在书店买了一本物理教科书。

   tā zài shū​diàn mǎi le yī běn wù​lǐ jiào​kē​shū.

   He bought a physics textbook at the bookstore.

   Source: Dong Chinese Dictionary

2. 请大家把教科书翻到第87页。

   qǐng dà​jiā bǎ jiào​kē​shū fān dào dì87 yè.

   Open your textbooks to page 87.

   Source: OpenSubtitles

3. 他不小心买了一本盗版的教科书。

   tā bù xiǎo​xīn mǎi le yī běn dào​bǎn de jiào​kē​shū.

   He accidentally bought a pirated textbook.

   Source: Dong Chinese Dictionary

4. 这本教科书是用简单的英语写的。

   zhè běn jiào​kē​shū shì yòng jiǎn​dān de Yīng​yǔ xiě de.

   This textbook is written in simple English.

   Source: Tatoeba

5. 这种数学记号在教科书中非常常见。

   zhè zhǒng shù​xué jì​hao zài jiào​kē​shū zhōng fēi​cháng cháng​jiàn.

   This kind of mathematical notation is very common in textbooks.

   Source: Dong Chinese Dictionary