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单词 humic acid
释义

WordReference Random House Unabridged Dictionary of American English © 2024
humic acid, 
  1. Chemistrya brown, melanin-tinted mixture of polymers, found in lignite, peat, and soils, where it acts as a cation exchange agent: used in drilling fluids and inks.
  • 1835–45

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更新时间:2024/11/10 17:30:24