However, the generalized symmetric regularized long wave equation u tt -u xx -u xxtt +f(u) xt =0 may have not only bell profile solitary wave solutions but also kink profile solitary wave solutions.

• 广义对称正则长波方程utt-uxx-uxxtt+f(u) xt=0可能既有钟状孤立波解 ；又有扭状孤立波解 .