Spy, an English word, noun and verb, means "spy" when used as a noun; A spy; " When used as a verb, it means "engage in espionage; Suddenly see; Recognize. "

　　Bilingual examples:

　　He tailed the spy to his hotel 。

　　He followed the spy to his hotel.

　　Special Agent/Spy, also known as secret police and political police, usually belongs to government employees and works for security, military and political systems.

　　Agents are generally trained, including foreign languages, psychology, fighting, local customs, tracking and anti-tracking, the establishment and management of intelligence networks, and then carry out long-term internships to perform special tasks. They are usually on duty in a secret way, and they are police officers who aim at domestic and foreign threats and protect national security.

　　Secret service organizations include FBI, CIA, KGB, MI6, etc.