urban 实在一篇讲非机动车的现状得文章non-motorised vehicles use may decline in the coming decade,with negative effects on air pollution,global warming,energy use,urban sprawl.
问题描述：
urban
实在一篇讲非机动车的现状得文章
non-motorised vehicles use may decline in the coming decade,with negative effects on air pollution,global warming,energy use,urban sprawl.
答
urban sprawl是指城市的无序扩张,即在城市边缘地区乱建房屋和建筑物,导致城市向四周不成比例地扩大,英文解释是Haphazard growth or extension outward,especially that resulting from real estate development on the outskirts of a city（美国传统词典）.