Events can also occur without any direct user interaction, such as when data finishes loading from a server or when an attached camera becomes active.
事件也可以在没有直接用户交互的情况下发生，例如数据结束从服务器加载，或者一个附加的摄像机被激活的时候。
Events can also occur without any direct user interaction, such as when data finishes loading from a server or when an attached camera becomes active.
事件也可以在没有直接用户交互的情况下发生，例如数据结束从服务器加载，或者一个附加的摄像机被激活的时候。
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