自20世纪初美国取代英国成为世界上首屈一指的经济大国,迄今已有近百年的时间,虽然期间经历过30年代的经济大萧条、90年代的网络泡沫破灭,以及近期次贷危机的打击,但美国依旧是世界经济实力最雄厚的国家。尽管近年来世界新兴经济体 Since the early 20th century, the United States replaced Britain as the world’s leading economic power. It has been nearly a hundred years so far. Although it experienced the economic depression during the 1930s, the dot-com bubble burst in the 1990s and the recent subprime mortgage crisis, The United States is still the most powerful country in the world economy. Despite the world’s emerging economies in recent years