平均首次故障时间 mean time to first failure
首次故障前平均时间 mean time to failure
两次故障间的平均时间 MTBF ; media time between faults
平均初次出故障时间 mean time to failure
首次故障平均时间 mean time to first failure
首次出故障的平均时间 MTFF MeanTimetoFirstFailure
首次故障时平均时间 mean time-to-first-failure
平均首次故障发生时间 MTTFF
去年一年时间里我经历了三次汽车故障：一次在高速公路上爆胎，一次保险丝烧毁还有一次陷入无油可用的境地。
During this past year I've had three instances of car trouble: a blowout on a freeway, a bunch of blown fuses and an out-of-gas situation.
在我加入服务的将近一年时间里，这是我经历的第一次故障。
This is the first outage I have experienced since I joined the service nearly a year ago.
最近S3经历了一次严重的故障。故障发生在S3分处不同地理位置的三个据点中的一个，持续时间超过两小时。
The outage occurred in one of S3's three geographical sites and lasted a little over two hours.
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