英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Trona的结果
Trona
(n.)
A native double salt, consisting of a combination of neutral
and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white
crystalline fibrous deposit from certain soda brine springs and lakes;
-- called also urao, and by the ancients nitrum.