During the present period, the main content ofurbanization is urbanizationofpopulation.
在我国目前阶段，城市化的一个重要内容就是人口的城市化。
2
But small towns not only carry on the extensive economic development, and small towns split flow external migration of rural population, objectively delay the urbanizationofpopulation migration.
但小城镇不仅承接了粗放的经济增长方式，而且小城镇分流了外迁农业人口，客观上推迟了人口迁移的城市化。
3
The number of yellow fever cases has increased over the past two decades due to declining population immunity to infection, deforestation, urbanization, population movements and climate change.