帮我翻译这篇文章The Great Wall To the northwest and north of Beijing

帮我翻译这篇文章
The Great Wall
To the northwest and north of Beijing, great wall a huge, serrated wall zigzags it's way to the east and west along the undulating
mountains. This is the Great Wall, which is said to be visible from the moon.
Construction of the Great Wall started in the 7th century B.C. The vassal states under the Zhou Dynasty in the northern parts
of the country each built their own walls great wall for defence purposes. After the state of Qin unified China in 221 B.C., it joined
the walls to hold off the invaders from the Xiongnu tribes in the north and extended them to more than 10,000 li or 5,000
kilometers. This is the origin of the name Of the "10,000-li Great Wall".
The Great Wall was renovated from time to time after great wall the Qin Dynasty. A major renovation started with the founding of the
Ming Dynasty in 1368, and took 200 years to complete. The wall we see today is almost exactly the result of this effort. With
a total length of over 6,000 kilometers, it extends to the jiayu Pass in Gansu Province in the west and to the mouth of the
Yalu River in Liaoning Province in the east. What lies north of Beijing is but a small section of it.
"I did not see Great Wall from space": Yang Liwei

长城
向西北和北方的北京,长城,巨型锯齿形墙,它是曲折的方式向东部和西部沿起伏
山里.这是长城,据说在月亮上看得到它.
建造长城开始于7世纪公元前奴婢各国根据周代北部
该国每建自己的墙壁长城防御目的.经过国家秦统一中国,在公元前221 ,它加入
墙壁举行过侵略者从匈奴族在北方和延长他们一万多利或5000
5000公里.这是原产地题写了"万里长城" .
长城不时进行装修后,长城的秦王朝.一项重大的改造开始成立大会
明朝1368年,并采取了200年才完成.墙,我们今天看到的是,几乎正是由于这方面的努力.同
总长度超过6000公里,它延伸到嘉裕关甘肃省西和嘴的
鸭绿江辽宁省东部.什么是京北只不过是一小部分.
"我没有看见长城,从太空" ：杨利伟