我是一个半吊子,我学分析的时候我们老师有一句话让我觉得特别有道理: natural numbers are natural, 0 is not natural at all, why should 0 be a natrual number?
Super 😱 This Guy Walked 20 Miles Every Day — Until a Cop Stalked Him
Dalbo
我是一个半吊子,我学分析的时候我们老师有一句话让我觉得特别有道理: natural numbers are natural, 0 is not natural at all, why should 0 be a natrual number?