self-confident
  (a.)有自信的
  Self-con·fi·dent a. Confident of one's own strength or powers; relying on one's judgment or ability; self-reliant. -- Self-con*fi*dent*ly, adv.
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  self-confident
       adj : showing poise and confidence in your own worth; "hardly more
             than a boy but firm-knit and self-confident" [syn: self-assured]