在过去二十年中，由于人群对疾病感染的免疫力下降、砍伐森林、城市化、人口流动和气候变化等因素的影响，黄热病病例数呈增加趋势。
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.
纵观人口状况的这些变化特点，都与人口的迁移流动有着密切的关系。
It is noticed that all features of change in population conditions have a close relationship with population floating and migration.
但是，外来人口在职业流动中职业地位的变化并不大。
But, the change of ab extra population in status of the profession in professional flow is not big.
在清朝激烈动荡的社会变革之中，东北的人口结构也相应的发生了深刻的变化，人口流动与迁移活动也相当频繁。
During Qing Dynasty's fierce and turbulent change, the population structure of the Northeast had changed deeply correspondingly, people flowed and moved quite frequently and actively.
以1990年和2000年两次人口普查资料为基础，分析了重庆市外来流动人口迁入的原因、特点、构成和变化特征。
Based on the collected data of population census of 1990 and 2000, this paper analyzes the causes, Characteristics, structure and changes of the floating population in Chongqing Municipality.
流动人口在全国各地寻找着机会，而家乡——原本唯一稳定、安全的家园概念，也无法避免的经历着根本性的变化。
Floating populations crisscrossed the country in search of opportunity. The only stable, secure notion of home was one's hometown, also undeniably undergoing radical changes.
这些研究和报导多数都是从社会环境变化和人口流动来分析和研究离婚问题，少有对农民工家庭婚姻本身的特别关注。
These analysis research divorce question on most all the social environment change, the population analyze, lack attention to marriage of rural labor migration family itself.
随着工业化、城市化的进程日益加快，市场对劳动力资源的需求增加，流动人口在规模不断增大的同时，其结构也发生了很重要的变化。
With more and more rapid process of industrialization and urbanization, the increasing demand for labor resources and the size of floating population, the structure of floating population has changed.
随着工业化、城市化的进程日益加快，市场对劳动力资源的需求增加，流动人口在规模不断增大的同时，其结构也发生了很重要的变化。
With more and more rapid process of industrialization and urbanization, the increasing demand for labor resources and the size of floating population, the structure of floating population has changed.
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