ADJ [usually ADJ n] (活动)神秘兮兮的，秘密的 A cloak-and-dagger activity is one which involves mystery and secrecy. (活动)神秘兮兮的，秘密的
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She was released from prison in a cloak and dagger operation yesterday.
在昨天的一次秘密行动中她从监狱获释。
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They met in classic cloak-and-dagger style beside the lake in St James's Park.
他们像经典间谍片里所演的那样，偷偷摸摸地在圣詹姆斯公园的湖边相会。