amateurish
  (a.)業餘的,非專門的,不熟練的
  Am·a·teur·ish, a. In the style of an amateur; superficial or defective like the work of an amateur.  -- Am*a*teur*ish*ly, adv. -- Am*a*teur*ish*ness, n.
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  amateurish
       adj : lacking professional skill or expertise; "a very amateurish
             job"; "inexpert but conscientious efforts"; "an
             unskilled painting" [syn: amateur, inexpert, unskilled]