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。
Coral reefs are rock like structures built by layers of coral organisms, called polyps.
珊瑚礁是硬如岩石的结构建筑分层的珊瑚有机体,称为水虫息。
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。
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