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  1. Oxford Dictionary

    undercover

    • IPA[ʌndəˈkʌvə]

    英式

    • adj.
      involving secret work within a community or organization, especially for the purposes of police investigation or espionage
    • 釋義

    形容詞

    • 1. involving secret work within a community or organization, especially for the purposes of police investigation or espionage an undercover police operation he worked undercover in Northern Ireland