1. In Portland, Maine, the land along the old train tracks near the coast has become a green belt of trails between areas characterized by housing developments and those characterized by downtown businesses.
    在缅因州的波特兰市，那离海岸不远处的旧铁路延线的土地已经变成了一长条绿化带，正好处于以住宅开发为特征的区域和市中心以商业为特征的区域之间。