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家庭场景中的“天工”机器人。受供者供图
，更多细节参见同城约会
Games and physics simulations need to detect which objects are touching or overlapping. With nnn objects, checking every pair is O(n2)O(n^2)O(n2) comparisons, which gets expensive fast. A hundred objects means roughly 5,000 pair checks. A thousand means nearly 500,000.
These 'avatars' will fly around the moon with NASA's Artemis 2 astronauts