美国简介（英文版）短!

美国简介（英文版）短!
美国简介（英文版）短!

美国简介（英文版）短!
United States of America
Britain's American colonies broke with the mother country in 1776 and were recognized as the new nation of the United States of America following the Treaty of Paris in 1783.During the 19th and 20th centuries,37 new states were added to the original 13 as the nation expanded across the North American continent and acquired a number of overseas possessions.The two most traumatic experiences in the nation's history were the Civil War (1861-65) and the Great Depression of the 1930s.Buoyed by victories in World Wars I and II and the end of the Cold War in 1991,the US remains the world's most powerful nation state.The economy is marked by steady growth,low unemployment and inflation,and rapid advances in technology.

The United States of America is a federal constitutional republic comprising fifty states and one federal district. The country is situated almost entirely in the western hemisphere: its forty-eight c...

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The United States of America is a federal constitutional republic comprising fifty states and one federal district. The country is situated almost entirely in the western hemisphere: its forty-eight contiguous states and Washington, D.C., the capital district, lie in central North America between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south; the state of Alaska is in the northwest of the continent with Canada to its east, and the state of Hawaii is in the mid-Pacific. The United States also possesses fourteen territories, or insular areas, that are scattered around the Caribbean and Pacific.
At 3.79 million square miles (9.83 million km²) and with over 300 million people, the United States is the third or fourth largest country by total area, and third largest by land area and population. The United States is one of the world's most ethnically diverse nations, the product of large-scale immigration from many countries.[6] Its national economy is the largest in the world, with a nominal 2006 gross domestic product (GDP) of more than US$13 trillion.[3]
The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard. Proclaiming themselves "states," they issued the Declaration of Independence on July 4, 1776. The rebellious states defeated Britain in the American Revolutionary War, the first successful colonial war of independence.[7] A federal convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic. The Bill of Rights, comprising ten constitutional amendments, was ratified in 1791. In the nineteenth century, the United States acquired land from France, Spain, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. The American Civil War ended slavery in the United States and prevented a permanent split of the country. The Spanish-American War and World War I confirmed its status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons and a permanent member of the United Nations Security Council. The sole remaining superpower in the post–Cold War era, the United States is perceived by many as the dominant economic, political, cultural, and military force in the world.[8]

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