n.化（假，匿）名（尤指秘密团体用的）

The cryptonym for the secret mission was "Operation Nightingale.
这次秘密任务的代号是“夜莺行动”。
The agent's true identity was protected by a cryptonym, "Agent 007."
特工的真实身份被一个代号“007特工”所保护。
The codebook contained a list of cryptonyms used in the spy network.
代码本中包含间谍网络中使用的代号列表。
The cryptonym "Blackbird" referred to the top-secret aircraft project.
代号“黑鸟”指的是绝密的飞机项目。
To maintain secrecy, the base was known only by its cryptonym, "Site X.
为了保持机密性，该基地仅以其代号“X站”为人所知。
The cryptonym "Magic Carpet" was used for the diplomatic negotiation process.
代号“魔术地毯”用于外交谈判过程。
The intelligence officer decoded the message using the cryptonym "Sunflower.
情报官员使用“向日葵”这个代号解码了这条消息。
The covert operation was given the cryptonym "Project Phoenix.
这次隐蔽行动被赋予了“凤凰计划”的代号。
The spy's cover name was a cryptonym that was never spoken aloud.
线人的掩护名字是一个从不被大声说出的代号。
In espionage circles, cryptonyms are used to protect the identities of agents.
在间谍圈子里，代号被用来保护特工的身份。