·······································································
·······································································
···································································
一組集是未定義的,所以它不是一組首先。- Kiteretsunu
A set of all sets is undefined, so it's not a set in the first place. - Kiteretsunu
0 篇文章
如果覺得我的文章對您有用,請隨意打賞。你的支持將鼓勵我繼續創作!