提示:①世界上最长的城墙。
②约4-5米宽,最宽处可供五匹马或十个人并行(at the widest part, …can walk along it side by side. )
③2700多年前,古代皇帝为保卫国家命人修建长城,后来秦始皇(Later Qin Shihuang)等命人修整。
Ladies and gentlemen:
Welcome to Beijing, now let me introduce (介绍) Beijing to you.
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