皮脊装订的

例句：

1. 1. The bookstore had a large display of rare books in a pigeonhole.
   这家书店有一个大型展示柜，里面摆满了稀有书籍。
2. 2.He placed his papers in a pigeonhole to keep them organized.
   他将文件放在一个隔间里，以便保持组织有序。
3. 3.The professor's office was filled with pigeonholes for all his research materials.
   教授的办公室充满了他的研究材料的小隔间。