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The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.
，这一点在快连下载安装中也有详细论述
An investigation into the incident is under way.
第三十一条 增值税法第二十四条第一款第九项所称门票收入，是指第一道门票收入。
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