by went to bus they Badaling .怎样连词成句

初三英语同义句:The Great Wall at Badaling opens at 6.30 a.m.and closes at 7 p.m.in summer.(between)
The Shanghai Museum lies in the centre of Shanghai.(location)

．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

英语翻译
The Badaling section,which is in the northwestern suburb of Beijing,runs about 3,741 meters on a mountain of about 700 to 800 meters above sea level,dotted with 19 beacon towers.

From Beijing,you can visit the Great Wall at Badaling,70 kilometres northwest of the city.请问of在这里是什么意思?