  In the framework of canonical seesaw model, we present a simple but viable
scenario to explicitly break an $S^{}_{3{\rm L}} \times S^{}_{3{\rm R}}$ flavor
symmetry in the leptonic sector. It turns out that the leptonic flavor mixing
matrix is completely determined by the mass ratios of charged leptons (i.e.,
$m^{}_e/m^{}_\mu$ and $m^{}_\mu/m^{}_\tau$) and those of light neutrinos (i.e.,
$m^{}_1/m^{}_2$ and $m^{}_2/m^{}_3$). The latest global-fit results of three
neutrino mixing angles $\{\theta^{}_{12}, \theta^{}_{13}, \theta^{}_{23}\}$ and
two neutrino mass-squared differences $\{\Delta m^2_{21}, \Delta m^2_{31}\}$ at
the $3\sigma$ level are used to constrain the parameter space of
$\{m^{}_1/m^{}_2, m^{}_2/m^{}_3\}$. The predictions for the mass spectrum and
flavor mixing are highlighted: (1) The neutrino mass spectrum shows a
hierarchical pattern and a normal ordering, e.g., $m^{}_1 \approx 2.2~{\rm
meV}$, $m^{}_2 \approx 8.8~{\rm meV}$ and $m^{}_3 \approx 52.7~{\rm meV}$; (2)
Only the first octant of $\theta^{}_{23}$ is allowed, namely, $41.8^\circ
\lesssim \theta^{}_{23} \lesssim 43.3^\circ$; (3) The Dirac CP-violating phase
$\delta \approx -22^\circ$ deviates significantly from the maximal value
$-90^\circ$. All these predictions are ready to be tested in the ongoing and
forthcoming neutrino oscillation experiments. Moreover, we demonstrate that the
cosmological matter-antimatter asymmetry can be explained via resonant
leptogenesis, including the individual lepton-flavor effects. In our scenario,
the leptonic CP violation at low- and high-energy scales are closely connected.
