English example sentences with "refine"

A furnace is an enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc.
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Good day, lords. In what way can I refine upon my adroitness in aural comprehension?
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Good day, lords. In what way can I refine upon my adroitness in aural comprehension? It is genuinely arduous for me to fathom the parlance of the English, although my scribbling deftness is unerring.
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Is Algeria's oil cheap to refine?
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Is Algeria's iron cheap to refine?
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Journalists are people who believe that you can refine an announcement if you call it a report.
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Algeria can refine petroleum.
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Does Algeria have the infrastructure to refine its own crude oil?
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Does Algeria refine its own oil?
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Algeria needs to refine its own oil.
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Mary believes that teaching Tom helps her refine her own knowledge.
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