The bright blue sky is reflected in the surface of the lake in the middle of the forestThe bright blue sky is reflected in the surface of the lake in the middle of the forest
The surface of the water with a rabbit and the skyThe surface of the water with a rabbit and the sky
Pine trees and the sky reflected in the water surfacePine trees and the sky reflected in the water surface
A satellite above the surface of a celestial body. view from spaceA satellite above the surface of a celestial body. View from space
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..