  The coupled Gross-Pitaevskii equations for the g.s. of the three-species
condensates (3-BEC) have been solved analytically under the Thomas-Fermi
approximation. Six types of spatial configurations in miscible phase are found.
The whole parameter-space has been divided into zones each supports a specific
configuration (miscible or immiscible). The borders of the zones are described
by analytical formulae. Due to the division, the variation of the spatial
configuration against the parameters can be visualized, and the effects of the
parameters can be thereby understood. There are regions in the parameter-space
where the configuration is highly sensitive to the parameters. These regions
are tunable and valuable for the determination of the parameters.
