论文部分内容阅读
从怀柔青龙峡上山,登上悬崖峭壁的顶峰,能看到巍峨雄壮的古长城。古长城上六座烽火台虽经400年风风雨雨,其外形和内墙仍是青色未变,墙砖结实牢固。据说烽火台旁的黄沙土至今黏性很好。此段长城北向慕田峪,西到玉皇顶前数百米,东为怀柔通京城边境。历代烽火台四面有瞭望孔,明代是三面有瞭望孔,明三暗九,可
From Huairou Qinglongxia up the mountain, climb the cliffs of the summit, you can see the towering majestic ancient Great Wall. Although the four ancient beacon towers on the Great Wall after 400 years of ups and downs, the shape and interior walls are still blue unchanged, strong solid brick wall. It is said that the yellow sand next to the beacon has a good viscosity so far. This section of the Great Wall to Mutianyu north, west hundreds of meters before the Jade Emperor, east of Huairou pass the capital border. Beacon towers all over the history have a look hole, the Ming Dynasty has three holes, three dark nine