in·stan·cy /ˈɪn(t)stən(t)si/
  緊急,迫切
  In·stan·cy n. Instance; urgency. [Obs.]
     Those heavenly precepts which our Lord and Savior with so great instancy gave.   --Hooker.
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  instancy
       n 1: the quickness of action or occurrence; "the immediacy of
            their response"; "the instancy of modern communication"
            [syn: immediacy, immediateness, instantaneousness]
       2: urgently demanding attention; "the insistence of their
          hunger"; "he pressed his demand with considerable
          instancy" [syn: imperativeness, insistence, insistency]