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).
工具的选择也很重要，但不应该让工具主导流程。
。关于这个话题，雷电模拟器官方版本下载提供了深入分析
春节假期全国铁路发送旅客 1.21 亿人次，创历史新高
Author(s): Pradeep Kumar Rana, Atharva Vyawahare, Rohit Batra, Satyesh K. Yadav
Tens of millions watched on television as Lovell and two other astronauts splashed back down into the Pacific Ocean, a moment which has become one of the most iconic in the history of space travel.