microfilm
n[C, U]
(piece of) film on which extremely small photographs are stored, esp of documents, printed matter, etc 缩微胶卷(用以保存文件、 印刷材料等)
scientific papers on microfilm 在缩微胶卷上的科学文件. microfilm, v [Tn]
photograph (sth) using such film 用缩微胶卷拍摄(某物)
microfilm secret papers, bank accounts, etc 用缩微胶卷拍摄秘密文件、 银行帐目等.
My dear friend, Mathilde. Let me tell you something. That necklace you borrowed from me wasn't a real diamond necklace. It wasn't valuable at all. The stones in the necklace were made of glass. It was worth five hundred francs at the most.