population flow 人口流动
population flow from the countryside 农村人口流动
Because The Population Flow 由于人口流动频繁
the population flow 人口流动
population flow law 人口流动规律
rural population flow 农村人口流动
population flow model 人口流动模型
population-flow model 人口流动模型
Orderly population flow 有序人口流动
In sum, population flow exerts greater positive effects than negative ones on the economic development of the source areas of flow.
总之,农村人口流动对流出地经济发展的正面影响在很大程度上要超过对流出地经济发展的负面影响。
参考来源 - 河南省农村人口流动及其对流出地经济发展的影响研究In sum, population flow exerts greater positive effects than negative ones on the economic development of the source areas of flow.
总之,农村人口流动对流出地经济发展的正面影响在很大程度上要超过对流出地经济发展的负面影响。
参考来源 - 河南省农村人口流动及其对流出地经济发展的影响研究·2,447,543篇论文数据，部分数据来源于NoteExpress
If two flying insect populations took up residence in separate nearby valleys, chances are that individuals from each population would fly back and forth, continuing gene flow.
如果有两个飞行昆虫种群居住在相距不远的不同山谷中，那么任一种群中的个体都有可能来回飞行，从而使基因流动继续。
This article briefly reviews the academic research in the 20th century on Chinese rural population flow in previous ages before 1949 and gives a limited point of view to future study.
本文简要回顾了20世纪学术界对1949年以前中国历代农村人口流动所做的探索，并对未来的研究提出一管之见。
In this section, the author of the investigative unit s Village's basic situation, the population flow of the current situation of the detailed description and a more detailed analysis.
在这一部分，笔者对调查单位s村的基本情况、居民流动现状进行了细致的描述和比较详尽的分析。
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