1·The coclass proxy also contains a default parameterless constructor for creating an instance of the COM object it represents.
辅助类代理也包含一个默认的无参数构造器,用来建立它所代表的 COM 对象的实例。
2·The connection factory's constructor is parameterless, so the factory has mutator methods that can be invoked to control the properties of the connection the factory will supply.
连接工厂的构造器是无参数的,因此工厂有变异方法可以被调用,以控制工厂将提供的连接的特性。