  Considering the hierarchical structure of fermionic masses and the fermionic
flavor mixing puzzles in the Standard Model, we propose to relate them by the
see-saw mechanism, i.e. only the third generation of quarks and charged leptons
achieve the masses at the tree level, the first two generations achieves masses
through the mixings with the third generation, and the neutrinos achieve tiny
Majorana masses by the so-called Type-I see-saw mechanism. This new picture at
the fermion sector can explain simultaneously the flavor mixing puzzle and mass
hierarchy puzzle in the SM. In addition, a flavor-dependent model (FDM) is
proposed to realize the new mechanism, and observing the top quark rare decay
processes $t\to ch$, $t\to uh$ and the lepton flavor violation processes
$\mu\to3e,\;\tau\to3e,\;\mu\to3\mu$ is effective to test the proposed FDM.
