The probability is hard to calculate primarily because of the possibility of what are called common-cause accidents, where the loss of off-site power and of on-site power are caused by the same thing.

这个几率很难去计算的原因主要是因为发生所谓共发生事故的可能性，也就是说造成站外及站内电源掉线的是同一个原因。

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The probability is hard to calculate primarily because of the possibility of what are called common-cause accidents, where the loss of off-site power and of on-site power are caused by the same thing.

发生此类事故的概率很难估计，因为发生由于同种因素导致核电站内外同时断电的概率难以计算。

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The longer suffering from diabetes, the higher the probability of the cause of this disease.

患糖尿病愈久，引起此症之机率愈高。

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For example, even though a Nuke would cause ninety billion dollars in destruction the probability of this type of attack is so low that it creates a vector value below the benchmark needed to consider it a daily threat.

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Thus, by deliberately disrupting all redundant safety systems, saboteurs can cause a severe event that would have had only a very low probability of occurrence if left to chance.

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