non-static data member 非静态数据成员
static data member in use 说明静态数据成员的使用
Non-static data member initializers 非静态数据成员初始化器
static class data member 静态类数据成员
A static data member is not bound to a single instance of your class.
静态数据成员没有绑定到类的一个实例。
C + + Does derived class could inheritance Static data member and Static member function from Base class?
C+ +并派生类可以继承的静态数据成员，static成员函数从基类？
It is recommended that all serializable classes contain a private static data member named serialVersionUID, of type long.
建议让所有可序列化的类都包含类型为long、名为serialversionuid的私有静态数据成员。
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