【正文】
美國國家航空航天局聲稱幾乎是看不到的, 只有在近乎完美的條件下才可以;它并不比其他許多人造的物體更 顯著。要從月球上看到長城的話將需要優(yōu)于正常視力 17,000倍的空間分辨率。哈里伯頓。 3. East Pass of Shanhaiguan. This fort is near the eastern edges of the Great Wall. “ 東通 ” 山海關。 1. North Pass of Juyongguan pass, known as the Badaling. Made of stone and bricks from the hills, this portion of the Great Wall is meters ( ft) high and 5 meters ( ft) wide. “ 北通 ” 居庸關,也就是八達嶺。在 15世紀 4060年代,明朝修建了所謂的 “ 遼東長城 ” 。公元前 221年,秦始皇征服了所有反對國家而統(tǒng)一了個國,建立秦朝。 the majority of the existing wall was built during the Ming Dynasty. The Great Wall stretches from Shanhaiguan in the east, to Lop Nur in the west, along an arc that roughly delineates the southern edge of Inner Mongolia. The most prehensive archaeological survey has recently concluded that the entire Great Wall, with all of its branches, stretches for 8, km. This is made up of 6, km sections of actual wall, km of t