详细解释:特务机关, 秘密情报工作
【法】 秘密机关, 特务机关, 密探
英语解释：
名词 secret service:
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同义词：United States Secret Service, US Secret Service, USSS, SS