蔓延: 1.(向周围扩展) creep; spread; extend; sprawl 短语和例子葡萄藤沿墙蔓延。 the grape-vine creeps along the wall. 这种疾病在城里蔓延得很快。 the illness spread quickly in the town. 火从工厂蔓延到附近的房屋。 the fire spread from the fac
The federal government carried out the housing policy and highway act vvhich were beneficial to the suburbanization . the measures of holc and fha also promoted it . the large quantity of highways subsidized by the federal government stimulated cities to spread out and diffuse further 联邦政府实施有利于郊区发展的住房政策和公路法案，如房主贷款公司和联邦住房管理署的各项举措就促进了住房的郊区化；联邦政府资助修建的大量高速公路进一步刺激了城市向外蔓延和扩散。
