Comments on the Parametrization of the Kobayashi-Maskawa Matrix

We show that the quark mixing matrix can be parametrized in exactly unitary forms with the imaginary parts present only at the order of 10^-3. With s_x=s₁ and s_y well determined, measurements of ɛ' or other CP-nonconservation effects can determine s_zs_φ. Then after |V_ub|~=s_z is measured, s_φ is known. We also give a simple expression for the CP asymmetry in the B⁰-B⁰ mixing.