Reflection of mountains in the lake surface winter dayReflection of mountains in the lake surface winter day
The surface of the lake against the background of snow-capped mountainsThe surface of the lake against the background of snow-capped mountains
The surface of the lake against the background of a very beautiful sunsetThe surface of the lake against the background of a very beautiful sunset
The water surface is the best landscape for travelingThe water surface is the best landscape for traveling
В математике: граница, отделяющая геометрическое тело от внешнего пространства. Наружная сторона чего-н..