translation.en: 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.
translation.zh: 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。