缩微本

例句：

1. 1. The library has a collection of microfilms on history and science.
   图书馆收藏了关于历史和科学的微型胶片。
2. 2.She used to work in the archives, where she would microfilm important documents.
   她过去在档案馆工作，在那里她会对重要的文件进行微型胶片处理。
3. 3. The microfilm was so fragile that it could only be read by special equipment.
   这种微型胶片非常脆弱，只能通过特殊设备阅读。