Reflection of mountains and plains on the water surfaceReflection of mountains and plains on the water surface
Dawn with reflection of light on the water surfaceDawn with reflection of light on the water surface
White running clouds over the mountains and the water surfaceWhite running clouds over the mountains and the water surface
Stone surface against the background of the night skyStone surface against the background of the night sky
A lonely island on the background of the sea surfaceA lonely island on the background of the sea surface
The journey of a lonely ship on the expanses of the water surfaceThe journey of a lonely ship on the expanses of the water surface
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..