An abstract base class imposes unnecessary restrictions on application - oriented development of the class hierarchy.

抽象基类给面向应用的开发的类结构强加了不必要的约束.

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To find these functions, see the class hierarchy diagram of the base class of such information.

若要寻求这些函数的信息, 请参阅类层次结构图中该类的基类信息.

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This model can help users to retrieve need by combining class hierarchy with user profile.

该模型结合用户访问模式和类层次结构来检索用户需要的信息.

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For information about distributing overloaded methods in a class hierarchy, see Overloading methods.

有关类层次中分布重载方法的信息, 见重载方法.

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