Title Text:Refs generally say that you can exercise enough altitude control to avoid the ground, but if you start strategically choosing air layers to steer yourself, that’s traveling. Origin:https://xkcd.com/2805/ https://www.explainxkcd.com/wiki/index.php/2805:_Global_Atmospheric_Circulation 全球大气环流 裁判通常会说你可以通过保持足够的高度来避免落地，但如果你开始战略性地选取不同的大气高度来利用风转向，那就算走步了。 https://xkcd.in/… Read more