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1. Oxford American Dictionary

   high-grade

   • IPA[ˈhīˌɡrād]

   美式

   • adj.
     of very good quality；(of ore) rich in metal value and commercially profitable.
2. • 釋義

   adj.

   形容詞

   • 1. of very good quality high-grade printing papers
   • ▪ (of ore) rich in metal value and commercially profitable.