Archaeologists set out recently to unlock one of the secrets of Stonehenge, the majestic monument in southern England-when were the first standing stones placed at the ancient religious site?

最近考古学家想要揭开英国南部庄严的“纪念碑”巨石阵之谜——这充满神秘色彩的地方什么时候有了雏形的？ ！