1. She forgot her schoolbook at home, so she had to borrow one from a classmate.

她把她的课本忘在家里了，所以她不得不向同学借一本。

2. The schoolbook covers a wide range of subjects, including math, science, and history.

这本教科书涵盖了广泛的科目，包括数学、科学和历史。