ex·trac·tion /ɪkˈstrækʃən/
  抽出,取出,抽出物
  ex·trac·tion /ɪkˈstrækʃən/ 名詞
  拔出,取出,提取,浸出,摘出術,摘除術
  extraction
  析取
  extraction
  取 萃取 擷取
  Ex·trac·tion n.
  1. The act of extracting, or drawing out; as, the extraction of a tooth, of a bone or an arrow from the body, of a stump from earth, of a passage from a book, of an essence or tincture.
  2. Derivation from a stock or family; lineage; descent; birth; the stock from which one has descended. “A family of ancient extraction.”
  3. That which is extracted; extract; essence.
     They [books] do preserve as in a vial the purest efficacy and extraction of that living intellect that bred them.   --Milton.
  The extraction of roots. Math. (a) The operation of finding the root of a given number or quantity. (b) The method or rule by which the operation is performed; evolution.
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  extraction
       n 1: the process of obtaining something from a mixture or
            compound by chemical or physical or mechanical means
       2: properties attributable to your ancestry; "he comes from
          good origins" [syn: origin, descent]
       3: the act of pulling out (as a tooth); "the dentist gave her a
          local anesthetic prior to the extraction"