rel·e·van·cy /-vən(t)si/
  關聯;切合;適切
  Rel·e·vance Rel·e·van·cy n.
  1. The quality or state of being relevant; pertinency; applicability.
     Its answer little meaning, little relevancy bore.   --Poe.
  2. Scots Law Sufficiency to infer the conclusion.
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  relevancy
       n : the relation of something to the matter at hand [syn: relevance]
           [ant: irrelevance]