cred·i·bil·i·ty /ˌkrɛdəˈbɪləti/
  可信用,確實性,可靠
  Cred·i·bil·i·ty n.  The quality of being credible; credibleness; as, the credibility of facts; the credibility of witnesses.
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  credibility
       n : the quality of being believable or trustworthy [syn: credibleness,
            believability] [ant: incredibility]