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在解析几何中,把点或线段投影到坐标轴上或与坐标轴平行的直线上,往往易于发现点的坐标与线段长度之间的联系,从而简化运算过程.
In analytical geometry, the point or line segment is projected onto a coordinate axis or a line parallel to the coordinate axis, and it is often easy to find the link between the point coordinate and the line segment length, thereby simplifying the calculation process.