youdao

The above example showed how to create a blank physical data model, but what if you already have the database defined and you want to modify your design.

上面的示例演示了如何创建空白物理数据模型，但是如果已经定义了数据库，希望修改设计，那么应该怎么办？

youdao

Frameworks that base the object model design on the structure of the database are called wrapping frameworks.

将对象模型设计建立于数据库结构之上的那些框架称为包装框架。

youdao

Instead of trying to revamp JIMS with brand-new technology, Harris County has stuck to its grand-design architecture by migrating its legacy database to the more current Model 204 Database Management System, made by Computer Corporation of America, and rewriting Cobol applications in the Model 204 language.

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