求翻译：　唐清纪年题名八角石柱：唐代珍贵文物，领先角形状。石柱上刻有唐代杜佑、清代阮元两位大学者的题字，十分难得。八角石柱刻有杜佑题名，原设立在扬州唐衙城淮南节度使衙门内。后官署改为兴教寺该石不见，清阮元寻访得之并题字记述了寻访过程。之后石柱又历经多次失而复得，至今能够得以保存，更加难得。是什么意思？

Tang Ching Annals Title octagonal pillars: precious cultural relics of Tang Dynasty, leading angular shape. Pillars engraved with the Tang Dynasty, Du, Qing Ruan Yuan, two University of the inscription, very rare. The octagonal stone pillars engraved with Du title, the original set up within the in

jinian Tang Ching entitled 8 corner stone artifacts, the Tang Dynasty, leading-edge corner shape. Engraved on a stone pillar during the Tang Dynasty, Qing Dynasty, Nguyen won two university, 10, of the inscriptions is rare. corner stone pillars carved with 8 TU-name, the original set up refugees in

Tang numbers the years the autograph octagonal stone column clear: Tang Dynasty precious cultural relic, leading angle shape.On the stone column inscribes Tang Dynasty Du You, the Qing Dynasty Ruan Yuan two scholar's inscription, extremely rare.The octagonal stone column inscribes Du You to autograp

Octagonal stone pillars Tang Qing calendar title: precious cultural relics of the Tang dynasty, lead angle shape. On a stone pillar inscribed with Tang dynasty Du You, Ruan Yuan Qing dynasty inscriptions of two great scholars, are very rare. Octagonal stone pillars carved with Du You title, original

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