“TTTC”是“Take Time To Care”的缩写，意思是“花点时间

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“URAA”是“Uruguay Round Agreements Act of 1994”的缩

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“USA”是“United States Army”的缩写，意思是“美国陆军”

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“USAID”是“United States Agency for International

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“USBR”是“United States Bureau of Reclamation”的缩

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“USCS”是“United States Customs Service”的缩写，意思

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“USGS”是“United States Geological Survey”的缩写，意

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“USIA”是“United States Information Agency”的缩写，

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“USITC”是“United States International Trade

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“USMS”是“United States Marshals Service”的缩写，意

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