Abstract object in the form of a ball on a wooden surfaceAbstract object in the form of a ball on a wooden surface
Futuristic map of the earth's surface in green lightFuturistic map of the earth's surface in green light
The surface of the reservoir in the mountains daytime color photoThe surface of the reservoir in the mountains daytime color photo
Space shuttle on the background of the earth's surfaceSpace shuttle on the background of the earth's surface
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..