Only recently in the history of their species have people gathered in the densely populated and highly structured settlements we call cities.
仅仅是在人类历史很短的时间内，人们不断地聚集，形成了许多人口密集的、且具有高度组织化的聚居地，即我们所称的城市。
Only recently in the history of their species have people gathered in the densely populated and highly structured settlements we call cities.
仅仅是在人类历史很短的时间内，人们不断地聚集，形成了许多人口密集的、且具有高度组织化的聚居地，即我们所称的城市。
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