microfilm durability test

例句：

1. 1. The scientist used a microfilm to record the experiment.
   科学家使用微缩胶片记录了实验。
2. 2.The microfilm was scanned and then printed on a computer.
   微缩胶片被扫描并打印在电脑上。
3. 3. The microfilm was used to create a timeline of events in the past.
   微缩胶片被用来制作过去事件的时间表。