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本文通过举例说明了如何利用抛物线的准线来解决焦点弦的相关问题,阐明了如何进行抛物线上的点到焦点的距离与到准线距离的等价转化.
This paper gives an example of how to use the line of the parabola to solve the problem related to the focus chord, and illustrates how to transform the distance from the point to the point on the parabola to the equivalent distance to the line of sight.