2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39382We review the results on representing the differential cross section for W-pair produciton, including W decay and hard-photon bremsstrahlung, in terms of a Born-form approximation of fairly simple analytic form. The result of the Born-form approximation are compared with full-one-loop results. The emphasis is on the energy range of future $e^+e^-$ (or $μ^+μ^-$) colliders.presented at ECFA/DESY Linear Collider Workshop, Obernai, 16-19th October, 1999, to appear in the Workshop ProceedingsHigh Energy Physics - Phenomenologytext