．People are familiar with sections such as Badaling in Beijing and Jiayuguan Pass in Gansu,because they have been open to tourists for many years．But those sections far away from the public eyes have been almost forgotten． 翻译
Few local people knew the 3一metre—high walls made of earth and stones beside them are part of the Great Wall．The lack of knowledge is considered as one of the main reasons behind human 这个帮翻译下