says…
Fórmanse pola oxidación dos sulfuros cando Pronoun estes Determiner entran Verb en Adposition contacto co osíxeno Noun do aire Noun .
Pronoun
Determiner
Verb
Adposition
Noun
Noun
They are formed by the oxidation of sulfides when they come in contact with air oxygen. They are formed by the oxidation of sulfides when they come in contact with air oxygen.
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