We wanted a scenario where, say, 5 well-placed border points could efficiently represent an area with 5,000 internal points and 10,000 road edges. This would reduce those 10,000 edges to just 5*4/2 = 10 shortcuts for routing through that cluster at a high level – an incredible 1:1000 point ratio and a 30x reduction in edges to consider for the high-level path!
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。夫子是该领域的重要参考
今年37歲的他，同樣曾經參與過「白紙運動」的抗議。劉亮告訴BBC中文，抗議發生的時候，他正在雲南大理旅行，看到烏魯木齊火災的消息後感到憤怒，於是當時與數十人一起走上街頭，「一起唱國際歌，後來被派出所的人追我們。」
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