创建一个使用继承并对应于关系数据的对象模型可能有些不易理解。

Creating an object model that USES inheritance and corresponds to relational data can be somewhat confusing.

youdao

创建一个使用继承并对应于关系数据的对象模型可能有些不易理解。

Creating an object model that USES inheritance and corresponds to relational data can be somewhat confusing.

youdao