美国是一个高度发达的资本主义国家，其政治、教育、经济、军事、文化、创新等实力领衔全球。
写介绍美国的英语作文1
The United States of America, also known as the United States, the U.S., the U.S.A., and America, is a country in North America that shares land borders with Canada and Mexico, and a sea border with Russia. Extending from the Atlantic Ocean to the Pacific Ocean, the United States is a federal republic, with its capital in Washington, D.C.
The present-day continental United States has been inhabited for at least 15,000 years by indigenous tribes. After European exploration and settlement in the 16th century, the English established their own colonies—and gained control of others that had been begun by other European nations—in the eastern portion of the continent in the 17th and early 18th centuries. On 4 July 1776, at war with Britain over fair governance, thirteen of these colonies declared their independence. In 1783, the war ended in British acceptance of the new nation. Since then, the country has more than quadrupled in size: it now consists of 50 states and one federal district; it also has numerous overseas territories.
At over 3.7 million square miles (over 9.5 million km), the U.S. is the third or fourth largest country by total area, depending on whether the disputed areas of China are included. It is the world's third most populous nation, with nearly 300 million people.
The United States has maintained a liberal democratic political system since it adopted its Articles of Confederation on 1 March 1781 and the Constitution, the Articles' replacement, on 17 September 1787. American military, economic, cultural, and political influence increased throughout the 20th century; with the collapse of the Soviet Union at the end of the Cold War, the nation emerged as the world's sole remaining superpower. Today, it plays a major role in world affairs.