... Endpoint objects 对象末点 Event Notification objects 事件通知对象 Full text Catalog objects 完整文本目录对象 ...
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Objects that implement this interface can receive notification that an event has occurred, and they can respond to queries about the event.
实现此接口的对象可以接收事件已发生的通知，并且可以响应有关该事件的查询。
This strategy means that the control does not need to maintain a list of target objects for event notification-the delegate handles all registration and notification.
此策略意味着控件不需要维护事件通知的目标对象列表——委托可处理所有的注册和通知。
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