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1. Oxford American Dictionary

   secondary source

   • n.
     (in academic research) a book, article, or other source that provides information about an object of study but does not constitute direct, first-hand evidence

   • noun: secondary source, plural noun: secondary sources

2. • 釋義

   n.

   名詞

   • 1. (in academic research) a book, article, or other source that provides information about an object of study but does not constitute direct, first-hand evidence the author relied heavily on secondary sources such as journalistic accounts