While digging foundations for new buildings, the builders often uncovered archaeologically valuable sites.

在给新建筑打地基的时候，建筑者常常会挖掘到一些有价值的文物遗迹。

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"The whole landscape is full of prehistoric monuments and it is extraordinary in a way that this has been such a blind spot for so long archaeologically, " he said.

BBC: Stonehenge occupied 5,000 years earlier than thought