Elon Musk: @engineers_feed 可以说，pi 的实际限制是以普朗克长度为单位测量宇宙半径所需的位数 simple.m.wikipedia.org/wiki/Planck_le …

原推：@engineers_feed Arguably, the practical limit of pi is the number of digits required to measure radius of the universe in units of Planck length simple.m.wikipedia.org/wiki/Planck_le…
https://twitter.com/elonmusk/status/1623189990015369216