USA
also U.S.A., abbreviation of United States of America, in use by 1814 in addresses, etc.; not common otherwise before c.1920. Before then it often also meant United States Army.
| 词汇 | USA |
| 词根词缀 | Online Etymology Dictionary USA also U.S.A., abbreviation of United States of America, in use by 1814 in addresses, etc.; not common otherwise before c.1920. Before then it often also meant United States Army. |
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