deviate (on the average) from perfect flatness. The flat-earth theory
would make it seem that the surface doesn't deviate from flatness at
all, that its curvature is 0 to the mile.
deviate (on the average) from perfect flatness. The flat-earth theory
would make it seem that the surface doesn't deviate from flatness at
all, that its curvature is 0 to the mile.