Science experiments test tube knowledge discovery desktop wallpaperScience experiments test tube knowledge discovery desktop wallpaper
Geometric shapes in the form of a triangle and a circleGeometric shapes in the form of a triangle and a circle
Image of a dragon silhouette on a black backgroundImage of a dragon silhouette on a black background
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.