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.

youdao

如果函数是虚函数，并且调用是通过引用或者指针，编译器基于动态类型生成代码确定调用哪个版本。

If the function is virtual and the call is through a reference or pointer, then the compiler generates code to determine which version to run based on the dynamic type of the object.

youdao

当你通过基类的指针来调用虚函数，技术也是一样的。

When you invoke calls through a pointer to the base class, the technique is the same.

youdao