in·du·bi·ta·ble /(ˌ)ɪnˈdubətəbəl, ˈdju-/
  (a.)無疑的,確實的,明白的
  In·du·bi·ta·ble a.  Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain; as, an indubitable conclusion. -- n. That which is indubitable.
  Syn: -- Unquestionable; evident; incontrovertible; incontestable; undeniable; irrefragable.
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  indubitable
       adj : too obvious to be doubted [syn: beyond doubt(p)]