根据文[1],直线l及其平行线被有心圆锥曲线L截得弦的中点和曲线L的中心都在同一直线l’上,直线l’叫有心圆锥曲线L关于直线l的共轭直径.有心圆锥曲线中类西摩松线的内容是:在中心为O的圆锥曲线L上任取三点A、B、C,曲线L关于直线BC、CA、AB的共轭直径分别为OD、OE、OF,在曲线L上取异于A、B、C的一点 According to [1], the line l and its parallel line are centered by the concentric conic curve L and the center of the curve L is on the same line l′. The line l′ is called the conjugation of the concentric conic curve L with respect to the line l. The content of the diameter-centered conic curve in the West-Muslim line is: Take three points A, B, and C on the conic section L whose center is O. The conjugation diameter of the curve L with respect to the straight line BC, CA, and AB is OD, respectively. OE, OF, take a different point on curve L from A, B, C