考虑到这些宅第的年代和规模，它们中的大多数在过去某些时候一定有人死在其中。

And given their age and size, most of them must have had people die in them at some point.

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相反，目前美国把用过的燃料棒存放在地下的水池里或装在干桶里，其中年代较远的燃料被放入充满惰性气体的钢罐里，然后存放在废弃的洲际导弹发射井中。

Instead, spent fuel rods in the U.S. are currently stored in underground pools of water or in dry-cask storage, where older fuel is put into steel cans filled with inert gas and then stored in silos.

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二十世纪九十年代中，世卫组织估计全球患病人数为250万人，其中46万是新病例。

In the 1990s, WHO estimated global prevalence at 2.5 million, of which 460 000 were new cases.

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