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usss 
n.
- the United States intelligence agency that protects current and former presidents and vice presidents and their immediate families and protects distinguished foreign visitors; detects and apprehends counterfeiters; suppresses forgery of government securities and documents;
United States Secret Service, US Secret Service, USSS, Secret Service, SS
翻译中，请稍等...( 查询一个长句试试看:-)
