section closed up

例句：

1. 1.The team divided the work into sections before starting.
   团队在开始之前将工作分成了若干部分。
2. 2. The book is divided into several sections for easy reading.
   这本书被分成了几个部分，便于阅读。
3. 3. The teacher explained the material in sections to ensure understanding.
   老师将材料分成几个部分来解释，以确保理解。