Painted surface with autumn leaves in drops of waterPainted surface with autumn leaves in drops of water
A picture of two delicate fresh flowers on a wet surfaceA picture of two delicate fresh flowers on a wet surface
The effect of a low, lonely wave on a blue water surfaceThe effect of a low, lonely wave on a blue water surface
Beautiful photo of a heart on a textured surface in the reflection of rainbow colorsBeautiful photo of a heart on a textured surface in the reflection of rainbow colors
A green leaf of a tree on the water surface of the lakeA green leaf of a tree on the water surface of the lake
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..