The USA is the fourth largest country in the world. It's smaller than Russia, Canada and China. Washington DC is its capital. But it is a quiet city. New York is the biggest city in America and it's one of the biggest cities in the world. It is in the east of the USA and at the mouth of the Hudson River(哈德逊河). A large part of the city is on Manhattan Island(曼哈顿岛), a big island in the river. New York has a larger population(人口)than Washington DC. In New York we can see famous statue, the Statue of Liberty(自由女神像).