The Forbidden City was surrounded by a ten metre high city wall and enclosed by a moat of 52 metres wide. At each corner of the city wall, there is a magnificent watchtower. All of them were used for protecting the emperor and his imperial family.是什么意思_The Forbidden City was surrounded by a ten metre high city wall and enclosed by a moat of 52 metres wide. At each corner of the city wall, there is a magnificent watchtower. All of them were used for protecting the emperor and his imperial family.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句