Science experiments test tube knowledge discovery desktop wallpaperScience experiments test tube knowledge discovery desktop wallpaper
A sphere on a dark background. inside the north is a round ballA sphere on a dark background. inside the north is a round ball
Geometric shapes in the form of balls in large numbersGeometric shapes in the form of balls in large numbers
Предмет или действие, служащее условным знаком какого-н. понятия, чего-н. отвлечённого.