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单词 brightener
释义

WordReference Random House Unabridged Dictionary of American English © 2024
bright•en•er  (brītn ər),USA pronunciation n. 
  1. a person or thing that brightens.
  2. Chemistrya chemical or other agent used to increase brightness, as one added to toothpaste or detergent to intensify the cleansing or bleaching process.
  • brighten + -er1 1790–1800

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