地震次生火灾对人类的危害极大。
Post-earthquake fires cause significant harm to human populations.
遗传病是对人类健康危害极大的一种疾病，它严重影响人口素质。
Hereditary disease is a kind of disease that is greatly harmful to human health. It affects severely population quality.
地震次生火灾对人类的危害极大。
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