Coastal landscape with a hill, a water surface and a gray skyCoastal landscape with a hill, a water surface and a gray sky
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
An astronaut landed on the moon for a scientific study of the surfaceAn astronaut landed on the moon for a scientific study of the surface
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..