The setting sun, going beyond the edge of the forest, is reflected in the water surfaceThe setting sun, going beyond the edge of the forest, is reflected in the water surface
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..