counterintelligence

/ˌkaʊn.t̬ɚ.ɪnˈtel.ə.dʒəns/

名词

反情报秘密行动，反间谍活动
The government employed a team of experts in counterintelligence to protect classified information from foreign spies.
政府雇用了一组反情报专家团队来保护机密信息免受外国间谍的侵扰。