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1. Oxford American Dictionary

   primary source

   • n.
     (in academic research) a document, first-hand account, or other source that constitutes direct evidence of an object of study

   • noun: primary source, plural noun: primary sources

2. • 釋義

   n.

   名詞

   • 1. (in academic research) a document, first-hand account, or other source that constitutes direct evidence of an object of study the archive allows researchers unprecedented access to primary sources about the development of Irish language policy over the past century