.
____________________________________________________________. Otherwise, the barges that carry about 1,700 tons of cargo apiece - 15 times the tonnage of a railcar and 40 times more than a truck can carry - are pretty much the same as they were in the 1920s.
在其他方面，这些驳船和20世纪20年代没什么不同，它们能装载1700吨的货物，是火车的15倍，卡车的40多倍。
That’s when the U.S. Army Corps of Engineers began dredging America’s large inland waterways to create deep channels to accommodate barge traffic.
从那时起，美军工程兵团为适应驳船业的发展，开始为内陆大河清淤，加深航道。
