| value | 当发生该事件时调用的委托。 |
当短语识别系统发生错误时触发的事件。
如果错误是由用户可以自行修复（例如，麦克风不可用）的问题引起，您应指导用户纠正问题。在此例中，您应显示一条消息，让用户重新连接麦克风，然后尝试重启短语识别系统。
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