abbr. 美利坚合众国(=United States of America);美国陆军(=United States Army);美国钢铁工人联合会(=United Steelworkers of America)
Do you need a visa for the USA?
你需要美国签证吗?
I bought a copy of "USA Today" from a street-corner machine.
我从售货机上买了一份《今日美国》。
Team USA reached the semifinals by defeating New Zealand in the second round.
美国队在第二轮击败新西兰队后进入了半决赛阶段。
I went to the USA last month.
上个月我去了美国。
The machine is made in the USA.
这台机器是美国制造的。