Before I talk about that,谈到这之前I&#39ve 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&#39s three-quarters, roughly,大约为3比4which is less than one -- and we call that sublinear.小于1,呈“次线性”And here&#39s the point of that.这里有一点值得注意It says that, if it were

So here&#39s 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?伦敦是一只大鲸鱼吗Is Edinburgh a horse?爱丁堡是一匹马吗Is Microsoft a great big anthill?微软是一座巨型蚁山吗What do we learn from that?我们从中能得到什

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 the second part of this century,到了本世纪下半叶the planet will be completely dominated整个地球都将被城市by cities.所主宰Cities ar

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.城市每周新增一百万人口的原因Because they think that all those wonderful things --他们觉得那些美好的事物like creative people, wealth, i