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单词 blue box
释义

WordReference Random House Unabridged Dictionary of American English © 2024
blue box, 
  1. an electronic device used by phone phreaks to send out signals that unlock long-distance telephone circuits.
  • 1975–80

Collins Concise English Dictionary © HarperCollins Publishers::
blue box n
  1. Canadian a blue plastic container for domestic refuse that is to be collected and recycled
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