求翻译：西安城墙景区位于西安市中心区，呈长方形，墙高12米，底宽18米，顶宽15米，东墙长2590米，西墙长2631.2米，南墙长3441.6米，北墙长 3241米，总周长11.9公里。有城门四座：东长乐门，西安定门，南永宁门，北安远门。西安城墙是在唐皇城的基础上建成的。完全围绕“防御”战略体系，城墙的厚度大于高度，稳固如山，墙顶可以跑车和操练。现存城墙建于明洪武七年到十一年(1374-1378)，至今已有600多年历史，是中世纪后期中国历史上最著名的城垣建筑之一，是中国现存最完整的一座古代城垣建筑。是什么意思？

Xi'an city wall scenic spot located in the central area of ​​Xi'an, rectangular, wall 12 meters high, 18 meters wide at the bottom, top width of 15 meters, 2590 meters long east wall, west wall length 2631.2 m, 3441.6 m long wall, north wall of 3241 meters long The total circumference of 11.9 km. Th

Xi'an city wall scenic area is located in Xi'an city wall, rectangular in shape, 12 meters high, 18 meters wide, and the top width 15 meters long, the east wall, the Western Wall 2590 meters long 631.2 meters long 441.6 meters, the south wall, north wall 3241 meters long and 11.9 kilometers in circu

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Xian city wall scenic area, is located downtown, is rectangular, walls 12 meters high, base width 18 meters, 15 meters wide, the East wall 2,590 meters long, Western Wall length 2631.2 m, 3441.6 metres long south wall, the North wall of 3,241 metres, total perimeter 11.9 km/h. Gates four: Changle Ga

Xi'an city wall scenic spot located in the central area of ​​Xi'an, rectangular, wall 12 meters high, 18 meters wide at the bottom, top width of 15 meters, 2590 meters long east wall, west wall length 2631.2 m, 3441.6 m long wall, north wall of 3241 meters long The total circumference of 11.9 km. Th