corroborative
  (a.)確定的;證實的
  Cor·rob·o·ra·tive a.  Tending to strengthen of confirm.
  Cor·rob·o·ra·tive, n. A medicine that strengthens; a corroborant.
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  corroborative
       adj : serving to support or corroborate; "collateral evidence"
             [syn: collateral, confirmative, confirming, confirmatory,
              corroboratory, substantiating, substantiative, validating,
              validatory, verificatory, verifying]