USAF
英
[ˌjuːeseɪ'ef]
美
[ˌjuːeseɪ'ef]
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abbr.
美国空军(=United States Air Force)
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abbr.
美国陆军部队(=United States Army Forces)
Noun:
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the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space
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