The( G' / G,1 / G)-expansion method is one of the most direct and effective method for obtaining new travelling wave solutions of nonlinear evolution equations in mathematical physics,which can be thought of as an extension of the( G' / G)-expansion method proposed recently. By using this method some new travelling wave solutions with arbitrary parameters of the famous Kd V equation and Burgers equation were obtained.When the parameters were replaced by special values,the well-known solitary wave solutions ...