When we think of large monumental structures built by early societies, an Egyptian pyramid probably comes to mind.
当我们想到早期社会建造的大型纪念性建筑时,很可能会想起埃及金字塔。
But there is no doubt that many structures built before the earthquake had been badly constructed.
但是无疑在震前建造的许多建筑物存在严重的质量问题。
Structures built on strong rock generally need no foundation since rock is usually as strong as concrete, and goes much deeper.
修筑在坚固岩石上的结构一般不需要基础,因为岩石通常和混凝土一样坚固,而且岩层更深。
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