The United States of America (USA) is the only superpower on this globe now. It is a developed country with persified cultures such as Asian, European and African. Some people call USA "the melting pot" because of the persity.

USA has a dominating power over economy, education, policitcs, milatary and culture all around the world. It has advanced industries, ideas and some of the smartest scientist on this earth.

But it also has its own problems such as racial discrimination and the widening gap between the rich and the poor.

美利坚合众国（USA）是世界上较早的一个超级大国.她是一个发达国家,有多元化的文化,像亚洲、欧洲和非洲的.正因为此,有些人把美国称为一个“大熔炉”.

美国现在在世界上的各个领域都雄霸一方,像经济、教育、政治、军事和文化.她有先进的工业、思想,并有全世界一些最聪明的科学家.

但是她也有自己的问题,比如种族歧视和穷富之间逐渐拉大的差距.