刚刚看到脸书分享，其中提到室外安全距离1公尺不适用于跑步，文章中做了跑步中飞尘
模拟，得出以下结论，大家参考看看。
On the basis of these results the scientist advises that for walking the dista
nce of people moving in the same direction in 1 line should be at least 4–5 m
eter, for running and slow biking it should be 10 meters and for hard biking a
t least 20 meters.
原始文章：
https://medium.com/@jurgenthoelen/belgian-dutch-study-why-in-times-of-covid-19
-you-can-not-walk-run-bike-close-to-each-other-a5df19c77d08