Redressing this imbalance requires a focus on key infrastructure. Of course, one cannot at reasonable cost prevent all possible damage from calamities, which strike randomly and in locations that cannot always be predicted.
修正这一失衡需要关注关键基础设施。当然，你不可能以有限的成本防止所有灾害造成的可能破坏，因为灾害袭击是随机的，受害地是不可预测的。但某些灾难具有很大的放大作用。