术语抽象基类听起来可怕，但是实际上没什么，它只是一个类，声明但没有实现它的函数而已。

The term abstract base class sounds formidable, but actually it is nothing but a class that declares the syntax of one or more of its functions without implementing them.

youdao

术语抽象基类听起来可怕，但是实际上没什么，它只是一个类，声明但没有实现它的函数而已。

The term abstract base class sounds formidable, but actually it is nothing but a class that declares the syntax of one or more of its functions without implementing them.

youdao