As soon as the railways were open into the Missouri Valley, affording an outlet for stock, there sprang up to the westward cattle and sheep raising on an immense scale.

铁路一通到密苏里河谷，为牲畜提供​​了出路， 就向西涌现了大规模的牛羊养殖。

Even at the end of the nineteenth century, after agriculture was well advanced and stock and sheep raising introduced on a large scale, minerals continued to be the chief source of wealth in a number of states.

甚至在 19 世纪末，在农业得到很好的发展和畜牧业大规模推广之后， 矿产仍然是许多州的主要财富来源。