The man who first suggested that so commonplace a substance as air, blown upon molten pig iron, would produce the intensest heat and destroy its impurities, made possible our steel railroads, our steel ships, and our steel cities.

第一个提出像空气这样普通的物质，吹在熔化的生铁上，会产生最强烈的热量并破坏其中的杂质的人，使我们的钢铁铁路、我们的钢船和我们的钢铁城市成为可能。