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.
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，详情可参考同城约会
再后来，谋生计是阿爸的第一任务。初三时，他为了赚学费去工地搬砖，复读了两年，还是没考上高中，他就去广东打工了。再后来，阿爸认识了阿妈，结婚之后，两个人就常年在外地。
Ultrasonic speakers are lowered into the sea to test if they scare fish away
Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.