espionage
noun [ U ] uk/ˈes.pi.ə.nɑːʒ/ us/ˈes.pi.ə.nɑːʒ/
（尤指获取他国政治、军事情报或商业情报的）间谍活动，间谍行为，刺探活动
the discovering of secrets, especially political or military information of another country or the industrial information of a business
military/industrial espionage 军事间谍活动／行业刺探行为