And so, for instance, consider the ways that strategies for making cities more bike-friendly have spread so rapidly from Copenhagen to New York to Austin to Boston to Seattle.
比如说， 看看那些致力于让城市更适于自行车通行的理念吧， 这些理念扩散得如此迅速， 从哥本哈根，到纽约，到奥斯丁，到波士顿，到西雅图。