A modern bomber cuts through the surface of the skyA modern bomber cuts through the surface of the sky
An interesting astronaut walking on the surface of the moonAn interesting astronaut walking on the surface of the moon
Coastal landscape with a hill, a water surface and a gray skyCoastal landscape with a hill, a water surface and a gray sky
Bright highlights on the background of the water surfaceBright highlights on the background of the water surface
Architecture of the night city with a long bridge over the water surfaceArchitecture of the night city with a long bridge over the water surface
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..