2009 年，张清森在一家外贸公司做业务员，但奈何工资太低，老板也抠，日子过得难受。
By a video game news site owned by ClickOut Media.
。关于这个话题，爱思助手下载最新版本提供了深入分析
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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