Reflection of clouds, mountain peaks and trees in the surface of the lake on a windless dayReflection of clouds, mountain peaks and trees in the surface of the lake on a windless day
The surface of the lake against the background of forests and mountainsThe surface of the lake against the background of forests and mountains
Stone surface against the background of the night skyStone surface against the background of the night sky
Lighthouse surrounded by a smooth surface of waterLighthouse surrounded by a smooth surface of water
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..