如果我们把“太空”定义为较低的地球轨道，比如大概距地面高度160至350公里航天飞机飞行的轨道，有两点可以揭穿长城传言。
If we take "space" to mean a low Earth orbit such as the one traveled by the space Shuttle roughly 160 to 350 miles above Earth, the Great Wall claim fails twice.
西汉王朝从汉武帝至汉宣帝期间，修筑了约两万里长城，其中绝大部分修建于汉武帝时期。
During the period from Emperor Wu to Emperor Xuan in the Han Dynasty, about 7000 miles of the Great Wall was built, most which was set up during the regime of Emperor Wu.
长城的修建一直持续到明代(1368至1644年)，终于建成为世界上最大的军事设施。
Construction continued up to the Ming dynasty (1368-1644), when the Great Wall became the world's largest military structure.
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