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单词 base metal
释义

WordReference Random House Unabridged Dictionary of American English © 2024
base metal, 
    1. Metallurgyany metal other than a precious or noble metal, as copper, lead, zinc, or tin. Cf. noble metal, precious metal.
    2. Metallurgythe principal metal of an alloy.
    3. Metallurgythe principal metal of a piece underlying a coating of another metal;
      core.

Collins Concise English Dictionary © HarperCollins Publishers::
base metal n
  1. any of certain common metals such as copper, lead, zinc, and tin, as distinct from the precious metals, gold, silver, and platinum
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