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单词 barium
释义 barium
 /bair"ee euhm, bar"-/, n. Chem.
 a whitish, malleable, active, divalent, metallic element, occurring in combination chiefly as barite or as witherite. Symbol: Ba; at. wt.: 137.34; at. no.: 56; sp. gr.: 3.5 at 20°C.
 [1800-10; BAR(YTES) + -IUM]
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