microforms

例句：

1. 1. The library has a collection of microforms on the history of the city.
   图书馆收藏了关于该市历史的微缩胶片。
2. 2.Microforms are often used to preserve historical documents.
   微缩胶片常用于保存历史文献。
3. 3.The archivist carefully cataloged all the microforms in the room.
   档案管理员仔细地为房间里的所有微缩胶片进行了分类。