Before I talk about that, 谈到这之前 I've written down at the bottom there 我在底下标出了 the slope of this curve, this straight line. 这条曲线的斜率，即这条直线 It's three-quarters, roughly, 大约为3比4 which is less than
So here's two questions 每当我思考这个问题 that I have in my head when I think about this problem. 两个疑问一直在我脑子里打转 The first is: 第一 Are cities part of biology? 城市是生物界的一部分吗 Is London a great big whale? 伦敦是一只大
Cities are the crucible of civilization. 城市是文明的熔炉 They have been expanding, 它们一直在扩张 urbanization has been expanding, 城市化的扩张速度 at an exponential rate in the last 200 years 在过去的200年里变得越来越快 so that by th
It goes up by 15 percent, 对于所有事物都是如此 and you have a 15 percent savings 你还能节省 on the infrastructure. 15%的基础设施经费 This, no doubt, is the reason 这无疑就是 why a million people a week are gathering in cities.
