"密探"相关例句(22)
15.The secret service got on to the enemy agent shortly after he arrived in the country.
17.He thinks everyone is a Martian and ice cream vendors are secret agents.
18.The act or practice of spying or of using spies to obtain secret information, as about another government or a business competitor.
19.The service had planted its agents and informers in some key positions in industry.

20.clandestine intelligence operations; cloak-and-dagger activities behind enemy lines; hole-and-corner intrigue; secret missions; a secret agent; secret sales of arms; surreptitious mobilization of troops; an undercover investigation; underground resistance.

