  We use the reduction of the string dynamics on AdS_4 x CP^3 to the
Neumann-Rosochatius integrable system. All constraints can be expressed simply
in terms of a few parameters. We analyze the giant magnon and single spike
solutions on R_t x CP^3 with two angular momenta in detail and find the
energy-charge relations. The finite-size effects of the giant magnon and single
spike solutions are analyzed.
