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1. Oxford American Dictionary

   cone of silence

   • n.
     an imaginary device that prevents eavesdropping on a private conversation.；an electronic device or isolated room intended for the same purpose.

   • noun: cone of silence, plural noun: cones of silence

2. • 釋義

   n.

   名詞

   • 1. an imaginary device that prevents eavesdropping on a private conversation.
   • ▪ an electronic device or isolated room intended for the same purpose.
   • 2. a directive that prohibits oral communication about a specified subject.
   • ▪ an agreement or conspiracy to maintain secrecy about a subject.