| 单词 | trona | 
| 释义 | tro·na    (trōnə)n.  A natural vitreous gray or white mineral, Na2CO3·NaHCO3·2H2O, used as a source of sodium compounds. [Swedish, probably from Arabic dialectal ṭrōn, variant of Arabic naṭrūn, natron; see  NATRON.]  | 
	
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