One key indicator of change in the environment surrounding these prehistoric settlements is the wood that was used there.

这些史前定居点周围环境变化的一个关键指标是当地曾使用的木材。

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A major question in the archaeology of the southwestern region of the United States is why so many impressive settlements, and even entire regions, were abandoned in prehistoric times.

美国西南地区考古的一个主要问题是，为什么这么多令人印象深刻的定居点，甚至整个地区，在史前时代就被废弃了。

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Major question in the archaeology of the southwestern region of the United States is why so many impressive settlements, and even entire regions, were abandoned in prehistoric times.

美国西南地区考古学的主要问题是：为什么这么多不俗的定居点，甚至整个西南地区，都在史前时代被遗弃了呢？

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He added that the discovery provided a unique opportunity to learn more about the earliest permanent settlements in prehistoric Britain and how such sites developed at a time when new practices were being adopted.

BBC: Kingsmead Quarry dig unearths Neolithic settlement