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单词 thoria
释义

WordReference Random House Unabridged Dictionary of American English © 2024
tho•ri•a  (thôrē ə, thōr-),USA pronunciation n. [Chem.]
  1. Chemistrya white, heavy, water-insoluble powder, ThO2, used chiefly in incandescent mantles, as the Welsbach gas mantle. Also called thorium oxide, thorium dioxide. 
  • thori(um) + -a4 1835–45

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