archival

The historian spent months examining archival documents from the time of the Civil War.

(Chinese) 历史学家花了几个月的时间查阅内战时期的档案文件。

Photographers use archival paper to ensure that their prints do not fade over many decades.

(Chinese) 摄影师使用存档级纸张，以确保他们的冲印照片在数十年内不会褪色。