显示器，指示器一种以视觉方式显示信息的装置，如荧光屏显示 A device that gives information in a visual form, as on a screen.
在计算机图形学中，在荧光屏上绘图的简单程序。典型的图元是长方块、线段、多边形等。 In computer graphics, the simple function for drawing on the screen. Typical primitives are rectangle, line, polygon, etc.