城市人口增长（urban population growth）在一定时期内由出生、死亡和迁入、迁出等因素的消长，导致城市人口数量增加或减少的变动现象。
同一基础上起步的芜湖和无锡，近代城市人口增长很快。
The population of Wuhu and Wuxi has increased greatly with the same base.
这些数字反映了我们对未来十年这个城市人口增长的预测。
These figures show our projection of the town's population increase in the next ten years.
另外一个问题是城市的随意扩张，城市向农村扩张速度有时候大大超过了城市人口增长的速度。
Another issue is urban sprawl. This is where cities expand into rural areas, sometimes at a much faster rate than urban population growth.
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