它们是系统开销最小的轻量级数据库，因为它们仅仅返回应用程序所请求的节点和成员指针。
They are lightweight databases with minimum overhead since they simply return the node and member Pointers requested by the application.
首先，Vee - Table指针用于访问虚函数，而对数据成员的访问直接使用编译时偏移量实现。
First, the Vee-Table pointer is used to access virtual functions, and data members are accessed directly using compile time offsets.
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