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. 在美国生活了几年，我虽然依然用american指代美国人，但是现在几乎不会用america来指代美国了。情感有点像我在说日语时也不会说にっぽん（nippon）来指日本。 the united states of.
Family Halloween costume, Jurassic Park costume, dinosaur costume
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