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单词 rare earth
释义

WordReference Random House Unabridged Dictionary of American English © 2024
rare earth, [Chem.]
  1. Chemistrythe oxide of any of the rare-earth elements contained in various minerals.
  • 1875–80

Collins Concise English Dictionary © HarperCollins Publishers::
rare earth n
  1. any oxide of a lanthanide
  2. Also called: rare-earth element
    another name for lanthanide
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