But equally importantly, you cannot calculate any of their individual value without understanding the role of the flows of people, of finance, of technology that enable them to thrive.
然而同等重要的是， 你不能单独计算它们独立的价值， 除非理解了人口流动的作用， 还有资金、科技的流动， 它们让特大城市得以繁荣。