Espionage

(n.) the activity of secretly getting important political or military information about another country or of finding out another company's secrets by using spies

间谍活动；谍报活动；刺探活动

(syn.) spying

e.g. Some of the commercial activities were a cover for espionage.

有些商业活动是为间谍活动提供掩护。

e.g. She may call it research; I call it industrial espionage.

她可以称之为研究，可我称它为产业情报刺探。