1. (活动)神秘兮兮的，秘密的
A cloak-and-dagger activity is one which involves mystery and secrecy.
e.g. 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。
e.g. 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。
adj
1. conducted with or marked by hidden aims or methods
e.g. clandestine intelligence operations
cloak-and-dagger activities behind enemy lines
hole-and-corner intrigue
secret missions
a secret agent
secret sales of arms
surreptitious mobilization of troops
an undercover investigation
underground resistance
Synonym: clandestine hole-and-corner(a) hugger-mugger hush-hush secret surreptitious undercover underground