You might need to construct the source data models by using reverse engineering techniques, developing Entity and Relation (er) models from existing source databases.
您可能需要通过使用逆向工程(reverse engineering)技术构造源数据模型，从而从现有的源数据库中开发实体和关系(Entity and Relation,er)模型。
Logic's two independences in the valid sufficient condition relation originated from sufficient conditional relation of experience, and in reverse it also serves empirical science.
逻辑有效充分条件关系中的逻辑的“两个独立性”源自经验的充分条件关系，又回过头来为经验科学服务。
Finally authors gave a succinct algorithm of kinship relation reasoning, including connection, reverse and simplification operation.
最后，给出一种简洁的亲属关系转换算法，主要包括连接、求逆、化简和组配等运算。
The relation of stress time to parameter degradation is investigated under the condition of reverse bias of base-emitter junction.
在基极-发射极反向偏置的条件下，研究了应力作用时间与器件参数的退化关系。
In addition, there exists mutual reverse application relation between Chinese Copyright Law and the Conventions because of the provisions from the two legal sources.
此外，中国著作权法与上述两公约还存在着相互反致适用关系，此乃两者的条文具体规定所致。
According to the second mode of EOF, the spatial variation of hail and gust in the plain shows a reverse trend in relation to mountainous areas, especially gust in the south Jiangxi.
第三特征向量表明冰雹和雷雨大风在武夷山附近与其他地区都存在反位相的变化。
Some data in relation show, some foreign-owned companies are able to reduce 9%-48% procurement cost price by adopting the The Reverse Auction Technology.
有关数据表明，国外一些企业采用反拍卖技术能够降低企业采购成本9%-48%。
Some data in relation show, some foreign-owned companies are able to reduce 9%-48% procurement cost price by adopting the The Reverse Auction Technology.
有关数据表明，国外一些企业采用反拍卖技术能够降低企业采购成本9%-48%。
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