There may be zero or multiple events at any time.
任何时候都可能有0个或多个事件。
This demonstrates that multiple events can be assigned to the same element.
这表明可以对同一个元素指定多个事件。
A subscriber can handle multiple events from multiple publishers.
一个订户可处理来自多个发行者的多个事件。
A subscriber can handle multiple events from multiple publishers.
一个订户可处理来自多个发行者的多个事件。
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