The plane had just been serviced three days before and no mechanical problems had been found. And so on.
飞机三天前刚维护过，也没发现什么机械故障。
No tourists were hurt when the ship sank because of mechanical problems, but the company tripled the original coral damage area by bungling salvage efforts.
虽然这艘船因机械故障沉没时没有游客受伤，但这个公司在拙劣的海上营救过程中损坏的原始珊瑚群却是平常的3倍。
Mechanical problems were blamed for an August 2007 crash in which there were no injuries.
在2007年8月发生的坠毁事故同样被归咎于机械故障，但那次没有人伤亡。
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