1.  confidential
2.  classified
3.  secret

• 1. 机密的: confidential | esoteric | classified | confidential adjective
• 2. 宫廷内机密的地方: hiddenrecesses | hidden recesses
• 3. 那些揭开机密的: At numbers and figures

更多释义

• 1.他们签署了一份保守机密的协议。
  They signed a confidentiality agreement.
  dict.yoduao.com
• 2.企业和政府机构日常面临的最大威胁来自于希望窃取金融数据和商业机密的骗子和间谍。
  The biggest day-to-day threats faced by companies and government agencies come from crooks and spooks hoping to steal financial data and trade secrets.
  dict.yoduao.com
• 3.貌似这里往北的地方有个非常机密的项目正在进行。
  Apparently there's a very hush-hush project under way up north.
  dict.yoduao.com

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