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).
Фото: Kristy Sparow / Getty Images
。关于这个话题，体育直播提供了深入分析
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陈燕深知交通运输事关群众生产生活的方方面面，城市公交的运营情况、农村公路的通行状况、货运司机的行业困境等，都是她关注的重点。
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