Cities, if unrestricted, tend to coalesce into bigger and bigger conurbations.如果不加限制，城市往往会联合发展成越来越大的集合城市。Gas bubbles coalesce to grow as they rise.气泡在上升中聚集成长.Particles do not coalesce with other particles.颗粒之间互不聚合....
Gas bubbles coalesce to grow as they rise.气泡在上升中聚集成长.Cities, if unrestricted, tend to coalesce into bigger and bigger conurbations...如果不加限制，城市往往会联合发展成越来越大的集合城市。Cities, if unrestricted, tend to coalesce into bigger and bi...