We present an intuitive approach for describing the angular distributions of leptons produced
in the Drell-Yan process and Z-boson production in hadron-hadron collisions. We show that
this approach can describe the pronounced transverse-momentum dependence of the $λ$ and $ν$
parameters, observed at the $γ∗/Z$ production at Tevatron and LHC, very well. The violation of
the Lam-Tung relation is attributed to the mis-alignment of the hadronic plane and the quark plane
in this approach, and can be well described in this approach.