in·tro·duc·tion /ˌɪntrəˈdʌkʃən/
  引進,傳入;採用;介紹;導言,引言;入門
  in·tro·duc·tion /ˌɪntrəˈdəkʃən/ 名詞
  介紹,序論,帶進,引種,引言,引進,採用,介紹,注射,進樣
  In·tro·duc·tion n.
  1. The act of introducing, or bringing to notice.
  2. The act of formally making persons known to each other; a presentation or making known of one person to another by name; as, the introduction of one stranger to another.
  3. That part of a book or discourse which introduces or leads the way to the main subject, or part; preliminary; matter; preface; proem; exordium.
  4. A formal and elaborate preliminary treatise; specifically, a treatise introductory to other treatises, or to a course of study; a guide; as, an introduction to English literature.
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  introduction
       n 1: the first section of a communication
       2: the act of beginning something new; "they looked forward to
          the debut of their new product line" [syn: debut, first
          appearance, launching, unveiling, entry]
       3: formally making a person known to another or to the public
          [syn: presentation, intro]
       4: a basic or elementary instructional text
       5: a new proposal; "they resisted the introduction of
          impractical alternatives"
       6: the act of putting one thing into another [syn: insertion,
           intromission]
       7: the act of starting something for the first time;
          introducing something new; "she looked forward to her
          initiation as an adult"; "the foundation of a new
          scientific society"; "he regards the fork as a modern
          introduction" [syn: initiation, founding, foundation,
           institution, origination, creation, innovation, instauration]