Abstract: Totally different points to the conclusions in reference 4 are presented in this paper. Some comments on the characteristics of classic Gauss-Appell-hetaeb nonholo-nomic dynamics and Vacco dynamics are given as well.Totally different points to the conclusions in reference 4 are presented in this paper. Some comments on the characteristics of classic Gauss-Appell-hetaeb nonholo-nomic dynamics and Vacco dynamics are given as well.