1. The full name of the English used in the United States is "United States of America."
2. "US" and "USA" are both abbreviations for the United States. "US" stands for "United States" and translates directly to "United States."
3. "USA" is the abbreviation for the full name "United States of America," but "US" is more commonly used.
4. "USA" is frequently used in sports events, including almost all international sports event management organizations. These organizations have strict regulations that require the use of the ISO-standard country abbreviations.详情
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