請把下麵的漢語翻譯成一句英文:
西安曾經長達一千一百年為中國首都,因秦始皇埋葬地的兵馬俑而著名。秦始皇於西元前二百二十一年統一中國,並自稱皇帝。
參考答案:
Xian, a city that served as China's ancient capital for over 1,100 years, is famed for the terracotta army at the burial site of Qin Shihuang, who presided over the unification of China in 221 BC and declared himself the first emperor.