undercover agent

英 [ˌʌndəˈkʌvə(r) ˈeɪdʒənt]

美 [ˌʌndərˈkʌvər ˈeɪdʒənt]

密探，特务，间谍；内线；线人

网络

英英释义

noun

• (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
  Synonym:spy