  We propose a new relation between quark mixing matrix and lepton mixing
matrix. Since the parameters in the quark sector are well determined, we employ
them to describe the mixing of leptons. Phenomenologically, we study the
neutrino oscillation probabilities for different channels, which can be
measured precisely in forthcoming reactor and accelerator experiments. As an
example of the applicability of our assumption, CP violation in the lepton
sector is also discussed. In the latest T2K experiment, the range of the mixing
angle $\theta_{13}$ is measured, and our prediction of $\theta_{13}$ is
compatible with their result.
