However, when we compare two derived objects, we want to compare data members that might be particular to that derived class.
但是，当比较两个派生类对象的时候，我们希望比较可能特定于派生类的数据成员。
However, when we compare two derived objects, we want to compare data members that might be particular to that derived class.
但是，当比较两个派生类对象的时候，我们希望比较可能特定于派生类的数据成员。
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