vi·bran·cy /ˈvaɪbrən(t)si/
  振動,振動性,活力
  Vi·bran·cy n. The state of being vibrant; resonance.
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  vibrancy
       n : having the character of a loud deep sound; the quality of
           being resonant [syn: plangency, resonance, reverberance,
            ringing, sonorousness, sonority]