因此，必须要对档案特别是那些珍贵的和已经有褪化迹象的档案进行安全保护。

Therefore, the file, especially the valuable files, and those who already have signs of fading must be given security protection.

youdao

因此，必须要对档案特别是那些珍贵的和已经有褪化迹象的档案进行安全保护。

Therefore, the file, especially the valuable files, and those who already have signs of fading must be given security protection.

youdao