历史上的圆明园建于1709年,全园东西长2620米,南北宽1880米,周边外围总长约11000米,共占地5200亩.
參考答案:The original Summer Palace was built in 1709, with a length(from east to west) of 2620 meters and a width(from south to north) of 1880 meters. The circumference of the whole palace is 11000m and covers an area of 5200 ares.
