A deputy object has its own persistent identifier, and may have additional attributes and methods that are not derived from its source objects.
一个代理对象享有其自己的标识符，而且除了继承源对象的属性和方法外，还能拥有独自的属性和方法。
A deputy object has its own persistent identifier, and may have additional attributes and methods that are not derived from its source objects.
一个代理对象享有其自己的标识符，而且除了继承源对象的属性和方法外，还能拥有独自的属性和方法。
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