你总倾向于认为自己能摆平，但这已经是一个告警信号了。
There is a tendency to think you can make it up, but this is a warning.
其中灰度直方图法是本系统告警信号灯识别的最佳方法。
The gray histogram arithmetic is the best method for this system.
机器是不可能突然故障的：通常机器在故障前会有告警信号，例如噪音、振动或发热。
This hardly ever happens out of the blue: there are usually warning signs such as noise, vibration or heat.
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