The railroad enables distribution across the entire North American continent.这条铁路使货物能够横穿整个北美大陆进行配送。The purpose of the expedition was to explore the North American coastline.这次探险的目的是考察北美的海岸。North American aborigines 北美洲土著居民This way of grinding corn is peculiar to North American Indians.这种碾磨谷物的方法是北美印第安人所特有的。