'It was a random failure that was not managed very well,' the engineer said.
这名工程师说，这是一个没有得到很好解决的随机故障。
The motor on the spot is in operation in the random failure period and therefore its failure rate is approximately a constant.
现场使用的电机基本运行在偶然失效阶段，因而其失效率近似为一常数。
The motor on the spot is in operation in the random failure period and therefore its failure rate is approximately a constant.
现场使用的电机基本运行在偶然失效阶段，因而其失效率近似为一常数。
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