"We realized in the mid-1970s that it was missing," says Effie Kapsalis, head of the Smithsonian Institution Archives.
2018年6月四级真题（第二套）阅读 Section C
The FBI worked closely with the Archives to determine that the letter was both authentic and definitely Smithsonian's property.
2018年6月四级真题（第二套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
档案;史料;记录;档案馆
The archive or archives are a collection of documents and records that contain historical information. You can also use archives to refer to the place where archives are stored.