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But the cooling systems malfunctioned in numerous reactors at the fukushima plant .

但福岛核电站众多反应堆的冷却系统发生了故障。

Those risks were realized when one of our planes malfunctioned over libya .

当我们的飞机在利比亚上空发生故障时，这类风险便成为现实。

During the raid , one of the u.s. helicopters malfunctioned and went down .

在突袭过程中，美国一架直升机因出现故障而下坠。

Indian scientists on sunday said they were studying the explosion to discover why the rocket , propelled by russian-designed engines , had malfunctioned .

印度科学家周日表示正在对爆炸进行调查，试图找出这枚由俄罗斯设计的引擎推进的火箭因何出现故障。

Phillips says the problem with aerial drones is that the u.s. federal aviation authority has strict rules on how and when they can be used because of the potential impact if they malfunctioned .

菲利普斯说，无人飞机的问题在于美国联邦航空管理局对无人飞机的使用方式和时间有严格规定，因为一旦无人飞机发生故障，可能会造成危害。