Bright highlights on the background of the water surfaceBright highlights on the background of the water surface
A green leaf of a tree on the water surface of the lakeA green leaf of a tree on the water surface of the lake
Macro photography of the surface of dry land on which the first raindrops fellMacro photography of the surface of dry land on which the first raindrops fell
An inhomogeneous surface with a visible image of a tigerAn inhomogeneous surface with a visible image of a tiger
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..