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Introduction to United States
註釋The United States is a federal republic located primarily in North America. It is composed of 50 states, a federal district, five major self-governing territories, and various possessions. With a population of over 328 million, it is the third most populous country in the world. The country's capital is Washington, D.C., and its largest city is New York City. The United States is a diverse and multicultural country, with a rich history shaped by indigenous peoples, immigrants, and colonizers. Its economy is the largest in the world, with a mix of capitalist and socialist policies. The country has a federal system of government, with power divided between the national government and the individual states. The Constitution serves as the supreme law of the land, and the country has a two-party political system dominated by the Democratic and Republican parties. The United States is known for its innovation, creativity, and leadership in a variety of fields, including science, technology, and entertainment.