time.sleep(2 ** attempt) # 指数退避
Three.js 零基础入门：手把手打造交互式 3D 几何体展示系统，详情可参考同城约会
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).，详情可参考heLLoword翻译官方下载
На Западе подчинили рой насекомых для разведки в интересах НАТО08:43