section constant

例句：

1. 1. The company has divided its operations into three main sections.
   该公司已将其业务分为三个主要部分。
2. 2.The teacher explained the new section of the textbook in detail.
   老师详细解释了教科书的新章节。
3. 3.The team worked on a project that involved several different sections.
   团队参与了一项涉及多个不同部分的项目。