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.

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分散稳定剂和单体用量是影响聚苯乙烯微球粒径分布的两个主要因素。

The amounts of stabilizer and monomer are the major factors that affected the size distribution of polystyrene microspheres.

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分散稳定剂和单体用量是影响聚苯乙烯微球粒径分布的两个主要内部因素。

The amount of stabilizer and monomer were major internal factors that affected the size distribution of polystyrene microspheres.

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