It remains common for the city to be treated as an undifferentiated unit in urban theory. This review of literature reveals that extant urban theory has been or can be inflected with a greater sense of intra- and interurban difference registering in implications for planning policy and practice pertaining to different substantive concerns and at different geographical scales. The article argues that we need to continue to pay attention to the spatially differentiated character of the urban if we are to advance urban planning thought and practice under contemporary conditions of extended urbanization.

中文翻译：

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哪个城市？扎实的当代城市理论

在城市理论中，将城市视为不可区分的单位仍然很普遍。对文献的回顾表明，现有的城市理​​论已经或可以在更大程度上理解城市内部和城市之间的差异，这对涉及不同实质性问题和不同地理尺度的规划政策和实践产生了影响。文章认为，如果要在当代城市化扩展条件下推进城市规划的思想和实践，就需要继续关注城市的空间差异性。