When an abstract class inherits a virtual method from a base class, the abstract class can override the virtual method with an abstract method.

当抽象类从基类继承虚方法时，抽象类可以使用抽象方法重写该虚方法。

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When an abstract class inherits a virtual method from a base class, the abstract class can override the virtual method with an abstract method.

当抽象类从基类继承虚方法时，抽象类可以使用抽象方法重写该虚方法。

youdao