我们余下的人必须躲开他们，不然只能静静站着等待一场不可避免的碰撞。
The rest of us have to evade them or just stand still to wait for the unavoidable collision.
尽管可以很容易避免，那确实是不必要的等待。
而且，通过接收停止事件，我们能够避免在内存中保留事件或等待相关的事件。
Moreover, by receiving the stop events, we could avoid keeping the events in memory and waiting for related events.
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