Pine trees and the sky reflected in the water surfacePine trees and the sky reflected in the water surface
Dawn with reflection of light on the water surfaceDawn with reflection of light on the water surface
Reflection of a watermill on the surface of the water in the eveningReflection of a watermill on the surface of the water in the evening
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..