@mllichti @daniel_eth @Neoavatara They're also among the most crowded public spaces. It's rare that you're within half an arms length of other people for hours in public. Crowded clubs/bars, theaters, planes, that's about it.
"Travel" includes far more than just time spent in the air on an airplane too.
@mllichti@daniel_eth@Neoavatara它们也是最拥挤的公共空间之一。很少有人在公共场合与别人保持半臂距离。拥挤的俱乐部/酒吧、剧院、飞机，仅此而已。
“旅行”也不仅仅包括在飞机上的飞行时间。