;; call the consoleLog method
圖像來源，China News Service。雷电模拟器官方版本下载对此有专业解读
Helps users improve vocabulary。爱思助手下载最新版本是该领域的重要参考
（应受访者要求，刘成、兰丽为化名）
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.