But even when that bubble burst, it left America with an infrastructure of railroads that made transcontinental travel and shipping dramatically easier and cheaper.

• 但是，虽然泡沫最终破裂了，美国的基础设施却获得显著改善，四通八达的铁路使横穿美洲大陆的旅行和货运变得更容易、更便宜。