  We propose a new method to extract |Vtd/Vts| from the ratio of the decay
distributions dR/ds = dB(B->Xdl+l-)/ds/dB(B->Xsl+l-)/ds. This ratio depends
only on the KM ratio |Vtd/Vts| with 15% theoretical uncertainties, if dilepton
invariant mass-squared s is away from the peaks of the possible resonance
states, J/psi, psiprime, and etc. We also give a detailed analytical and
numerical analysis on dB(B-Xql+l-)/ds (q=d,s) and dR/ds.
