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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).。夫子是该领域的重要参考
，更多细节参见safew官方下载
Google's Maps JavaScript documentation instructs developers to paste their key directly into HTML.
桩桩件件，立足当前、着眼长远，都是为了确保中华民族的永续发展，为了强国建设、民族复兴的根本之计。，详情可参考Line官方版本下载