类似整理扑克牌：每次拿一张新牌，插入到已排好序的牌堆中合适位置
Marianna SpringSocial media investigations correspondent
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Shortcut Pre-calculation: For the most commonly used speed profiles, the travel costs (time/distance) for shortcuts between border points within each cluster are pre-calculated and stored. (Each border point effectively has an "entry" and "exit" aspect for directed travel).
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