Berth near the smooth surface of the lake at sunsetBerth near the smooth surface of the lake at sunset
The surface of the ancient pond was covered with brown mudThe surface of the ancient pond was covered with brown mud
The sun appeared over the mountain, in front of which the water surface stretchedThe sun appeared over the mountain, in front of which the water surface stretched
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..