因此事件发射在缺省情况下是禁用的，所以必须显式地启用业务分析人员和主管希望观察的那些事件。
Event emission is therefore disabled by default, and so those events that business analysts and executives want to watch must be explicitly enabled.
观察演示代码中的通配符，客户端还订阅了额外的关闭事件，该事件是由MIDI文件播放器在文件的末尾发布的。
Observe that in the demo code, the client also subscribes to an additional closing event that is published by the MIDI file player at the end of file.
一些观察员把莫斯科这次爆炸事件看作是复仇行动。
Some observers see the Moscow bombings as an act of revenge.
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