Tip 5: Make sure that chosen key fields actually reflect the queries to be made.
技巧5：确保选定的关键字段真实地反映要做的查询。
Also, fields can be encrypted with a private key.
同样，可以使用私钥对字段进行加密。
A primary key consists of one or more fields that differentiate one record from another.
主键由区分不同记录的一个或多个字段组成。
Finally, several key research fields of EMIS at this stage are given.
指出了现阶段企业MIS系统的研究重点。
Finally, several key research fields of EMIS at this stage are given.
指出了现阶段企业MIS系统的研究重点。
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