Therefore, like π values, any other quantities (for example, the natural logarithm e, 21/2, and so on) described in modern mathematics are parts of this quantitative continuum. Here they have two meanings. First, all quantities have approximate meanings only in the comparison of a finite range. Second, if these values are extended to infinity, they lose their comparable meanings; in other words, infinity has only one quantity, and there is no distinction between these so-called different mathematical quantities.