COM needs just a little bit of help to perform all these miracles: it needs an object that knows how to pack and unpack the specific parameters of an interface's functions.
COM只需要一点儿帮助来实现所有这三个奇迹：它需要一个对象，这个对象要知道怎样打包和解包一个接口函数的指定参数。
When the application needs a business object instance, it will actually receive an instance of the dynamic proxy class.
当应用程序需要业务对象实例时，它实际会接收到一个动态代理类的实例。
Determining that an object needs configuring (typically because it has just been created).
确定对象需要配置(通常因为对象刚刚创建)。
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