For any two classes that have some relationship, identify the semantics of the relationship: is it association, aggregation, composition, or inheritance?
对于任意两个之间具有关系的类，确定关系的语义：是关联、聚合、合成还是继承？
The complication arises from the interaction between equality semantics and inheritance.
同等语义和继承之间的交互会产生一些复杂的情况。
The complication arises from the interaction between equality semantics and inheritance.
同等语义和继承之间的交互会产生一些复杂的情况。
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