... 电码本，密码本。 code book 标准电码本 official telegraph dictionary; standard code book 信号录；电码本 code book ...
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Books bar code printed of back cover of books and International Standard book Number (ISBN) of the books published formally have close relations.
正式出版的图书封底所印制的图书条形码与图书的国际标准书号(ISBN)有着密切的关系。
If you want the book to be categorized, either by a bookseller or a library, it has to be assigned a unique numerical code, like an ISBN, for International Standard book Number.
如果这本书需要能够被书商或是图书馆分类，它还需要一个独一无二的数字代码，例如IS BN(国际标准图书号)。
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