The population flow is a kind of complicated humane phenomenon. It has wide influence on social life.
人口流动和迁移是一种复杂的人文现象，对社会生活具有广泛的影响。
The economic growth is a complicated economic and social phenomenon. So, There are many factors to influence it.
经济增长是一个复杂的经济和社会现象，影响经济增长的因素很多。
The economic growth is a complicated economic and social phenomenon. So, There are many factors to influence it.
经济增长是一个复杂的经济和社会现象，影响经济增长的因素很多。
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