约束竞争的权利结构可分四大类，而任何社会通常是四类并存的。
Rights structures restraining competition are of four broad types, and they generally co-exist in any society.
而消费者的需求数量和结构的变化受到多方面因素如人口、经济、社会文化、购买心理和购买行为等的影响。
And changes in consumer demand and the number of structures affected by many factors such as population, economic, social, cultural, psychological, and purchasing behavior of purchase.
这种原始的方法可以使现有的城市结构(而不是殖民城市边缘地块)在镇中心安排社会住房难的问题。
This original approach serves to densify an existing urban fabric (rather than colonizing peri-urban plots) while arranging social housing sparingly and in the center of town.
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