Great Wall of China
- a fortified wall in northern China, extending some 2,400 km (1,500 miles) from Kansu province to the Yellow Sea north of Beijing. It was first built c. 210 BC, as a protection against nomad invaders. The present wall dates from the Ming dynasty.中国长城（中国北部带防御工事的城墙, 从甘肃省延伸至北京以北的黄海, 全长约2,400公里, 即1,500英里, 始建于约公元前210年, 旨在防御游牧侵略者, 现有城墙始建于明朝）。