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1. Oxford Dictionary

   trifocal

   • IPA[trʌɪˈfəʊk(ə)l]

   英式

   • adj.
     (of a pair of glasses) having lenses with three parts with different focal lengths.
   • n.
     a pair of glasses with trifocal lenses.

   • noun: trifocal, plural noun: trifocals

2. • 釋義

   adj.

   形容詞

   • 1. (of a pair of glasses) having lenses with three parts with different focal lengths.

   n.

   名詞

   • 1. a pair of glasses with trifocal lenses.