使用 Hibernate 为模型中的实体选择行为是很不错，但是对于不同的实体常常还需要不同的数据集。

Using Hibernate to select the behavior of an entity in the model is good, but often you also need different sets of data for different entities.

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如果“模型类”下拉列表未显示任何模型类，请确保已编译了此项目。实体框架使用反射，因此它需要已编译的程序集。

If the model class drop-down does not show any model classes, make sure you compiled the project. Entity Framework USES reflection, so it needs the compiled assembly.

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本文阐述并总结了实体造型的一些理论和关键算法，如正则集理论，基于推广的欧拉公式的表示模型，集合成员分类。

Some theories and key algorithms of solid modeling such as the theory of r-sets, representation model based on generalized Euler formulas, set membership classification are explained and summarized.

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