说明：  CIE 1931 色度图系统绘制，无弧形坐标轴与白色奇点，色度分布一般，无温差线，有待改进
(CIE 1931 Chromaticity Map System Drawing, No Arc Coordinate Axis and White Singularity, General Chromaticity Distribution, No Temperature Difference Line, Need to be Improved)