下游数千万的居民就会生活在过分泄洪的危险之中，假如有那么千分之一的几率，大坝由于战争，地震或者设计缺陷而溃坝，他们的处境就会变得更加危险。

Tens of millions of the people who live downstream of the dam would be endangered by overflow, or worse yet, the one-in-one-thousand chance of a dam collapse due to war, earthquake or design flaws.

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