The surface of the lake against the background of a very beautiful sunsetThe surface of the lake against the background of a very beautiful sunset
The water surface is the best landscape for travelingThe water surface is the best landscape for traveling
Cumulus sunset clouds over the surface of the lakeCumulus sunset clouds over the surface of the lake
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..