Here the crux is to bring the subjective and the objective into proper correspondence with each other.
这里的关键，就在于把主观和客观二者之间好好地符合起来。
In this paper, a proper analytic methods is proposed for determining the projective formulas when their centers are improper points between two line pencils of projective correspondence.
在两线束射影对应中，当两线束中心为非固有点时，两线束的射影关系式如何确定？本文给出了适当的解析方法。
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