Inheritance is an important feature in Object Oriented Programming, and UML provides a way to model it.

继承在面向对象编程中是一个重要的特性，UML为它的建模提供了方法。

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Multiple inheritance, on the other hand, was commonly held as a necessary element of object-oriented programming.

另一方面，多重继承往往被视为面向对象编程的必备要素。

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Users must understand the differences and interactions between metaclass programming and traditional object-oriented programming (under both single and multiple inheritance).

用户必须理解元类编程和传统面向对象编程的不同点和相同点(单继承和多继承)。

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Inheritance and encapsulation are features typically associated with object-oriented programming tools.

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