brownfield/ˈbraʊn.fiːld/形容词棕色地带的(指城镇中原为工业用地现准备重新开发的地区)Planners are committed to developing the city's brownfield sites before granting permission to build on the rural outskirts.城市规划者致力于先开发市内的棕色地带,之后才允许在城市外围建房。想跟读,去练习