This section of the railway is located atop a hill, hillside and is mostly composed of cement sealing, four men are how to climb the railroad?
这段铁路位于山坡之上，山坡又大都是由水泥固封，四名男子是如何爬上铁路的？
3
Why should freight be carried from Chicago to New York by railroad when we could employ enormously more men, for example, to carry it all on their backs?