Instead, it assigns a Universally unique identifier (UUID) to each and every document, making it almost impossible for another database to accidentally select the same unique identifier.
相反，它为每个文档分配一个通用惟一标识符(UniversallyUnique Identifier,UUID)，这就杜绝了其他数据库意外地选择相同的惟一标识符的情况。
Instead, it assigns a Universally unique identifier (UUID) to each and every document, making it almost impossible for another database to accidentally select the same unique identifier.
相反，它为每个文档分配一个通用惟一标识符(UniversallyUnique Identifier,UUID)，这就杜绝了其他数据库意外地选择相同的惟一标识符的情况。
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