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。
If you need to do any of the above or need to pass MFC-derived objects between the calling executable and the DLL, you must build an extension DLL.
如果需要执行上述任一操作，或者需要在调用可执行文件和DLL之间传递mfc派生的对象，则必须生成扩展dll。
An OLAP cube has a specific set of similar but more restrictive metadata objects derived from the parent cube model, including cube dimensions, cube hierarchies, cube levels, and a cube facts object.
olap多维数据集具有一组特定的、类似但却更多限制性的、衍生自父多维数据集模型的元数据对象，这些对象包括多维数据集维、多维数据集层次结构、多维数据集层和一个多维数据集事实对象。
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