Reflection of snowy mountains in the water surfaceReflection of snowy mountains in the water surface
A mirror image of the forest in the surface of the lakeA mirror image of the forest in the surface of the lake
Sunset illuminates the surface of the lake, the coast is reflected in the dark waterSunset illuminates the surface of the lake, the coast is reflected in the dark water
Reflection of the forest and mountains in the surface of the lakeReflection of the forest and mountains in the surface of the lake
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..