section with a switch or switches

例句：

1. 1.The book is divided into several sections.
   这本书被分成了几个部分。
2. 2. The team decided to divide the work evenly among them.
   团队决定将工作平均分配给他们。
3. 3. The teacher explained the material in sections for better understanding.
   老师把材料分成几个部分以便更好的理解。