万里长城是世界建筑奇迹之一。它东、西、南、北纵横交错绵延起伏于中国辽阔的土地上。东西相距长达5000多公里，因此被称之为万里长城，是月球上“ 唯一能看得见的人工工程”，也是中国第一名胜和中国旅游点的代表。
早在春秋时期，楚国就修筑了长数百千米的非封闭性城墙，叫作方城。战国时，燕、赵、魏、韩、秦等都在边界筑起了长城。秦始皇统一天下后，把燕、赵、秦原有的北方长城连接起来，筑成西起临洮东至辽东的长城，长万余里。今山西大同北部，甘肃岷县城西等地均有秦长城遗址。
在古代交通运输工具极其落后的情况下，修建如此巨大的工程，实在是一件了不起的事。特别是它不是一般的土墙，而是整齐的条石和结实的青砖砌筑的。有人计算，如果把明长城所用的砖、石和土方，筑成一道2米厚、4米高的围墙，可以绕地球一周。不用说烧制这些砖石，就是把它们通过崎岖的山间小路送达修建工地，已经是一项十分宠大的工程。因此，建造长城真是一件了不起的举措。
thanks～～！
參考答案:The Great Wall is one of world construction miracles. East it, west,south, north criss-crossed network is continuous the fluctuation onthe Chinese vast land. The thing is distanced long amounts to morethan 5,000 kilometers, therefore was called it the Great Wall, is "theartificial project which on the Moon only can be able to see", also isthe Chinese first scenic spot and a Chinese traveling representative. As early as in the Spring and Autumn Period time, Chu country hasconstructed the long several hundred kilometers misclosure city wall,is called the side city. When Warring States, the swallow, Zhao, Wei,Han, Qin and so on all built the Great Wall in the boundary. After theChin Shihhuang unified world, the swallow, Zhao, the Qin originalnorth Great Wall connects, builds west near 洮 east to Liaodong'sGreat Wall, long ten thousand miles. Now north the Shanxi Datong,places such as Gansu Min county west end have the Qin Great Wallruins. In the ancient times transportation tool extremely backward situation,the construction so huge project, really was a great matter. Speciallyit is not the general dirt wall, but is the neat long and narrow stoneand the solid blue brick masonry and building. Some people calculate,if uses the bright Great Wall the brick, the stone and the folkrecipe, build together 2 meters thick, 4 meter high fence, may circlean Earth week. Does not need to say burns these bricks and stones, isdelivers them through the rugged ravine alley constructs the worksite, already was item of ten points favors the big project.Therefore, constructs the Great Wall really is a great action.
