But the discovery of the Minnesota ore field, which alone could supply this essential product in the amounts which the furnaces demanded, immediately deprived the Pittsburgh region of its chief advantage.

但是明尼苏达矿田的发现，仅凭它就可以提供熔炉所需数量的这种基本产品，立即剥夺了匹兹堡地区的主要优势。

American industrial history presents few groups more brilliant, more resourceful, and more picturesque than that which, in the early seventies, started to turn these Minnesota ore fields into steel — and into gold.

在美国工业史上，很少有团体比 70 年代初开始将明尼苏达州的这些矿田变成钢铁和黄金的团体更辉煌、更足智多谋、更如画。