English to Spanish Science Physics

El texto trata sobre concentradores solares sin seguimiento.
"In the numerator ωyωd describes the frequency a region is visited, the root describes the intensity of a point source, proportional to the cosine of the incidence angle, or the ratio of solid angle to projected solid angle. The denominator accounts for the time the sun spends in an interval dkNdkE. Subtituting the time derivatives into equation 4 yields for the relative intensity."

Gracias!