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1. Oxford Dictionary

   precursor

   • IPA[prɪˈkəːsə]

   英式

   • n.
     a person or thing that comes before another of the same kind; a forerunner；a substance from which another is formed, especially by metabolic reaction

   • noun: precursor, plural noun: precursors

2. • 釋義

   n.

   名詞

   • 1. a person or thing that comes before another of the same kind; a forerunner a three-stringed precursor of the violin 同義詞 forerunner, predecessor, forefather, father, parent, ... 更多antecedent, ancestor, forebear, progenitor, pioneer, trailblazer
   • ▪ a substance from which another is formed, especially by metabolic reaction pepsinogen is the inactive precursor of pepsin