re·trac·tion /rɪˈtrækʃən/
  縮進,取消,撤回
  re·trac·tion /rɪˈtrækʃən/ 名詞
  退縮,縮回
  Re·trac·tion n.
  1. The act of retracting, or drawing back; the state of being retracted; as, the retraction of a cat's claws.
  2. The act of withdrawing something advanced, stated, claimed, or done; declaration of change of opinion; recantation.
     Other men's insatiable desire of revenge hath wholly beguiled both church and state of the benefit of all my either retractions or concessions.   --Eikon Basilike.
  3. Physiol. (a) The act of retracting or shortening; as, the retraction of a severed muscle; the retraction of a sinew. (b) The state or condition of a part when drawn back, or towards the center of the body.
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  retraction
       n 1: a disavowal or taking back of a previous assertion [syn: abjuration,
             recantation]
       2: the act of pulling or holding or drawing a part back; "the
          retraction of the landing gear"; "retraction of the
          foreskin"