In the object-oriented finite element program, utilizing the inheritance and polymorphism may establish the object family that has the same key features, and can achieve the reuse of the code.

在面向对象的有限元程序设计中利用类的继承机制和多态性，可以建立具有共同关键特征的对象家族，实现代码的重用；

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In the object-oriented finite element program, utilizing the inheritance and polymorphism may establish the object family that has the same key features, and can achieve the reuse of the code.

在面向对象的有限元程序设计中利用类的继承机制和多态性，可以建立具有共同关键特征的对象家族，实现代码的重用；

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