各种因素，如人口增长、住房及工作分散化等，促成了目前美国郊区的这种状况，而美国南方阳光带的郊区受影响尤其严重。
Factors such as population growth, housing and job decentralization have contributed to suburbs in the Sun Belt being especially affected.
第三部分从三个方面分析了东周时期影响人口增长的因素。
The third part analyzes the population growth factors from three aspects.
受各种因素的影响，人口增长的经济效应可能依时间、地点而有明显的差异。
With the change of time and place, the economic effects of population growth will change.
受各种因素的影响，人口增长的经济效应可能依时间、地点而有明显的差异。
With the change of time and place, the economic effects of population growth will change.
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