"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."