The heavenly surface of the lake on the background of the mountainThe heavenly surface of the lake on the background of the mountain
A grey ferrari car standing on a reflective surfaceA grey Ferrari car standing on a reflective surface
Boats on the sea surface in the light of the setting sunBoats on the sea surface in the light of the setting sun
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..