But that's getting harder to do, because cities are becoming smooth. 但这样的机会已经越来越少了,因为城市正在变得光滑。 New downtowns sprout towers that are almost always made of concrete and steel and covered in glass. 高塔在

发表于:2018-12-05 / 阅读(54) / 评论(0) 分类 TED演讲设计篇