In the heart of[ZiYuantun.Com] the Jordanian desert, the ancient city of Petra is full of mysteries. How was this architectural prowess achieved more than 2,000 years ago? © National Geographic 译文(3): 在约旦沙漠的中心地带，佩特拉古城充满了神秘色{资源屯-ziyuantun.com}。2000多年前，这种建筑技术是如何实现的？
