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单词 light bulb
释义

WordReference Random House Unabridged Dictionary of American English © 2024
light bulb′, 
  1. an electric light.
  • 1880–85

Collins Concise English Dictionary © HarperCollins Publishers::
light bulb n
  1. a glass bulb containing a gas, such as argon or nitrogen, at low pressure and enclosing a thin metal filament that emits light when an electric current is passed through it
    Sometimes shortened to: bulb
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