This will typically involve tightly controlled access for creation of editable versions of the model, with strong management roles involved at every stage of model use and development.
创建模型的可编辑版本时，一般会进行严格的访问控制，并在模型使用和开发的每一个阶段都进行严格的管理。
DbContext is a simplified version of ObjectContext, providing basic functionality for model caching, database provisioning, connection management, and schema creation. An example looks as following.
DbContext是ObjectContext的简化版本，提供了基本的模型缓存、数据库供应、连接管理及模式创建等功能。
The tool provided the creation management and maintenance of template and model, protract and output of operation flow chart and print and output of template and conceptual model.
该工具提供了模板和模型的创建、管理和维护，作战流程图的绘制和输出，模板和模型的打印输出等功能。
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