Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00570-4
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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let value = value in threshold matrix at (x, y)
3岁开始教她如何自己擦屁屁，因为是女孩子，小便也要告诉她怎么能擦干净。