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1. Oxford American Dictionary

   trona

   • IPA[ˈtrōnə]

   美式

   • n.
     a gray mineral which occurs as an evaporite in salt deposits and consists of a hydrated carbonate and bicarbonate of sodium.

   • noun: trona

2. • 更多解釋

   trona

   • IPA[ˈtrəʊnə]

   英式

   • n.
     a grey mineral which occurs as an evaporite in salt deposits and consists of a hydrated ...

   Oxford Dictionary