详细解释:美国, 美利坚合众国
英语解释：
名词 united states of america:
North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776同义词：United States, America, the States, US, U.S., USA, U.S.A.