EPISODE · May 29, 2020 · 4 MIN
博言地理课-明城墙为何屹立数百年不倒
from 博言地理课-5分钟了解地理小知识
今天我们看到的古城墙，大多是明朝是修建。尤其是南京的明城墙，距今已经600年上下了。如此旧的时间跨度，为何明代的城墙依旧屹立不倒呢？本期《博言地理课》和你一起探究。
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博言地理课-明城墙为何屹立数百年不倒
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