当然，在早期的建筑中——如冰屋和土坯结构——没有这样的设备，骨骼和皮肤通常是一体的。

Of course in early architecture—such as igloos and adobe structures—there was no such equipment, and the skeleton and skin were often one.

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在地中海区域的早期文明中，拱形结构主要被运用在地下排水管上，但在地上建筑中首先发展并广泛使用拱门的是罗马人。

The arch was used by the early cultures of the Mediterranean area chiefly for underground drains, but it was the Romans who first developed and used the arch extensively in aboveground structures.

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在达拉斯最大的社区中，一些人被埋在土堆中，这些土堆是对市政和宗教事务很重要的建筑物的子结构。

In the largest Dallas communities, some individuals were buried in the earthen mounds that served as sub-structures for buildings important to civic and religious affairs.

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