A quiet autumn dawn over the mirror surface of the lakeA quiet autumn dawn over the mirror surface of the lake
Autumn landscape of colorful trees reflected in the surface of the riverAutumn landscape of colorful trees reflected in the surface of the river
View of the flowing sea surface beyond the edge of the evening horizon, two lonely rocks look at each otherView of the flowing sea surface beyond the edge of the evening horizon, two lonely rocks look at each other
Quiet surface of the lake, landscape against the background of mountainsQuiet surface of the lake, landscape against the background of mountains
The heavenly surface of the lake on the background of the mountainThe heavenly surface of the lake on the background of the mountain
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..