世界首个「隐私屏」，用技术防偷看
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.
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坚持精准方略，找对路子，让发展成为消除贫困最有效的办法。。业内人士推荐heLLoword翻译官方下载作为进阶阅读
IAG reports record operating profits on margins of more than 15% at British Airways and sister airline Iberia