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- Changing the implementation of a virtual member between versions can cause subtle version incompatibilities. 在不同版本之间更改虚成员的实现可能会导致不易察觉的版本不兼容。
- During the war Mr. Churchill maintained such close contact with all operations as to make him a virtual member of the British chiefs of Staff. 在战争期间,邱吉尔先生对一切行动均保持密切接触,使他实际成为英国参谋首长中之一员。
- Because a virtual member is called regardless of which type the caller is using, it gives derived classes the option to completely change the apparent behavior of the base class. 由于在调用虚拟成员时不考虑调用方正在使用的类型,所以派生类可以选择完全更改基类的外观行为。
- Do provide a protected virtual member that offers the same functionality as the explicitly implemented member if the functionality is meant to be specialized by derived classes. 如果显式实现的成员的功能意在由派生类特殊化,则一定要提供具有相同功能的受保护虚拟成员。
- A class member, method, field, property, or event, on a derived class that is overriding a virtual member of the base class can declare that member as sealed. 在对基类的虚成员进行重写的派生类上的类成员、方法、字段、属性或事件可以将该成员声明为密封成员。
- When a derived class overrides a virtual member, that member is called even when an instance of that class is being accessed as an instance of the base class. 当派生类重写某个虚拟成员时,即使该派生类的实例被当作基类的实例访问,也会调用该成员。
- Virtual members perform better than callbacks and events, but do not perform better than non-virtual methods. 虚成员的性能高于回调和事件,但是不比非虚方法高。
- Many of the other extensibility mechanisms, such as protected and virtual members, require that a class be unsealed. 许多其他扩展性机制(如受保护成员和虚成员)要求类是未密封的。
- He is an active member of the school's stamp club. 他是学校集邮俱乐部的一名活跃会员。
- Our club is a member of the Football League. 我们的俱乐部是足球联合会的一员。
- He is as much a member of the orchestra as Tom. 他和汤姆同样是管弦乐队的成员。
- These children were in a state of virtual neglect. 这些孩子实际上处于无人照管的状态。
- He is a member of the Ivy League. 他是长春藤联合会的一员。
- He is a member of the Labor Party. 他是一名工党党员。
- He is a member of the medical fraternity. 他在医务界工作。
- She is a member of the Royal College of Nursing. 她是皇家护士协会的会员。
- A virtual state of war exist between the two countries. 这两国间实际上处於战争状态。
- He's a useful member of the team. 他是该队的一名强手。
- Our deputy manager is the virtual head of the business. 我们的副经理是公司的实际负责人。
- The master or a crew member of a barge. 驳船船夫船上的船长或水手