hubiesen exterminado

Para la época del primer tratado para limitar la proliferación, había ya suficientes armas nucleares acumuladas que - de haber sido todas detonadas - hubiesen exterminado la vida en el planeta.
By the time of the first treaty to limit proliferation, so many nuclear weapons were stockpiled that - had they all been detonated - life on this planet would have been exterminated.
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