va·pid·i·ty /væˈpɪdəti, ve, və-/
  乏味,走氣,無生氣,無趣
  Va·pid·i·ty n. The quality or state of being vapid; vapidness.
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  vapidity
       n : the quality of being vapid and unsophisticated [syn: jejunity,
            jejuneness, tameness, vapidness]