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机读目录是在书本目录与卡片目录的基础上发展起来的现代目录形式，它不仅兼有两者的许多优势，而且使目录体系更为科学，并由此对文献目录的编制与组织等产生一系列影响
The machine-readable catalog is a modern catalog form developed on the basis of book catalogs and card catalogs. It not only combines many of the advantages of both, but also makes the catalog system more scientific and hence produces and organizes bibliographic catalogs A series of effects