for certain
 肯定地,確切地


 Cer·tain a.
 1. Assured in mind; having no doubts; free from suspicions concerning.
    To make her certain of the sad event.   --Dryden.
    I myself am certain of you.   --Wyclif.
 2. Determined; resolved; -- used with an infinitive.
 However, I with thee have fixed my lot,
 Certain to undergo like doom.   --Milton.
 3. Not to be doubted or denied; established as a fact.
    The dream is certain, and the interpretation thereof sure.   --Dan. ii. 45.
 4. Actually existing; sure to happen; inevitable.
 Virtue that directs our ways
 Through certain dangers to uncertain praise.   --Dryden.
    Death, as the Psalmist saith, is certain to all.   --Shak.
 5. Unfailing; infallible.
    I have often wished that I knew as certain a remedy for any other distemper.   --Mead.
 6. Fixed or stated; regular; determinate.
    The people go out and gather a certain rate every day.   --Ex. xvi. 4.
 7. Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.
    It came to pass when he was in a certain city.   --Luke. v. 12.
    About everything he wrote there was a certain natural grace und decorum.   --Macaulay.
 For certain, assuredly.
 Of a certain, certainly.
 Syn: -- Bound; sure; true; undeniable; unquestionable; undoubted; plain; indubitable; indisputable; incontrovertible; unhesitating; undoubting; fixed; stated.


 for certain
      adv : definitely or positively (`sure' is sometimes used
            informally for `surely'); "the results are surely
            encouraging"; "she certainly is a hard worker"; "it's
            going to be a good day for sure"; "they are coming, for
            certain"; "they thought he had been killed sure
            enough"; "he'll win sure as shooting"; "they sure smell
            good"; "sure he'll come" [syn: surely, certainly, sure,
             for sure, sure enough, sure as shooting]