美国西部在开发前是一片现代文明几乎从未涉足的土地。那里有大草原，有荒漠、群山，还有半湿润的气候和世世代代在这里生息的印第安人，原始、神秘而壮丽。经过大规模开发建设，西部经济迅速崛起，带动了整个美国经济的起飞，也为其他国家落后地区的开发提供了许多值得借鉴的 Before the development of the western United States, it was a land where modern civilization almost never entered. There are savannahs, deserts, mountains, as well as semi-humid climates and Indians who have lived here and there for generations, primitive, mysterious and magnificent. After large-scale development and construction, the rapid rise of the western economy has led to the take-off of the entire U.S. economy and provided many lessons for the development of backward countries in other countries