America 就是美洲 一般也指美国或者北美 americana 是美国文化有关的产物、尤其指音乐方面的比较多 可以简单理解为american culture, 这个词不是特别常见 google 给. 1.美国正式的全称 the united states of america 2.拆分 ：united联合的+states州（美国有50个州1个特区）+america美洲=美利坚合众国，美国是 联邦制 可以从国家名字看出.
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