单词	Dewey decimal classification
释义	Dewey decimal classification noun Dew·​ey decimal classification ˈdü-ē-   also  ˈdyü- : a system of classifying books and other publications whereby main classes are designated by a 3-digit number and subdivisions are shown by numbers after a decimal point called also Dewey decimal system Word History Etymology Melvil Dewey First Known Use 1924, in the meaning defined above
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