bo·na fide /ˈbonəˌfaɪd, ˈbɑ; ˌbonəˈfaɪdi, ˈfaɪdə/
  (ad.)(a.)真誠地,真實地
  Bo·na fi·de  In or with good faith; without fraud or deceit; real or really; actual or actually; genuine or genuinely; as, you must proceed bona fide; a bona fide purchaser or transaction.
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  bona fide
       adj 1: undertaken in good faith; "a bona fide offer"
       2: not counterfeit or copied; "an authentic signature"; "a bona
          fide manuscript"; "an unquestionable antique";
          "photographs taken in a veritable bull ring" [syn: authentic,
           unquestionable, veritable]