该模型的设计参照了OMG和ODMG标准，支持对象和文字、类及其属性、方法和关系、外延和多重继承等概念。
Referring to the OMG and ODMG standard, the model includes the OO concepts, such as Objects, Literals, Attributes, Methods, Relationships, Extents and Multi-inheritance, etc.
继承修饰符控制派生类的方法和属性如何重写基类中的方法和属性。
Inheritance modifiers control how methods and properties from derived classes override methods and properties in a base class.
继承能使类建立在现有类的基础上，并重写选定的基类方法和属性。
Inheritance enables classes to build on existing classes and override selected base-class methods and properties.
在类设计器中，您可以允许子类中的方法和属性等成员重写从基类继承的成员。
In class Designer, you can allow members such as methods and properties in a child class to override members inherited from a base class.
在类设计器中，您可以允许子类中的方法和属性等成员重写从基类继承的成员。
In class Designer, you can allow members such as methods and properties in a child class to override members inherited from a base class.
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