Natural landscape with the reflection of a tree on the water surfaceNatural landscape with the reflection of a tree on the water surface
The surface of the water with a rabbit and the skyThe surface of the water with a rabbit and the sky
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
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..