Simone
The United States of America is a constitutional federal republic, situated primarily in North America. It comprises 50 states and one federal district, and has several territories with differing degrees of affiliation. It is also referred to, with varying formality, as the United States, the U.S., the U.S.A., the U.S. of A., America, the States, or (poetically) Columbia.
Since the mid-20th century, following World War II, the United States has emerged as a dominant global influence in economic, political, military, scientific, technological, and cultural affairs. Because of its influence, the U.S. is considered a superpower and, particularly after the Cold War, a hyperpower by some.
The country celebrates its founding date as July 4, 1776, when the Second Continental Congress—representing thirteen British colonies—adopted the Declaration of Independence that rejected British authority in favor of self-determination.
The structure of the government was profoundly changed in 1789, when the states replaced the Articles of Confederation with the United States Constitution. The date on which each of the fifty states adopted the Constitution is typically regarded as the date that state "entered the Union" to become part of the United States.
美国是一个宪政联邦共和国位于主要集中在北美. 它由50个州和一个联邦区,并有多个地区都有不同程度的从属关系. 它也被称为,以不同形式,如美国,美国,美国, 美国A型,美国中的国家,或(意译)哥伦比亚大学. 自20世纪中叶第二次世界大战结束后 美国已成为一个主要的全球影响力,在经济,政治,军事,科技和文化事务. 因为它的影响力,美国是一个超级大国,尤其是冷战结束后,一个超幂了一些建议. 国庆祝其成立日期为1776年7月4日, 在第二届大陆国会代表13个英国殖民地,通过了独立宣言,拒绝了英国权威主张自决的权利. 在政府的结构发生深刻变化,在1789年 当美国取代了文章邦联与美国宪法. 当日每年的五十个州通过了宪法通常被视为迄今为止该国 "进入联盟" ,成为美国的一部分.
