而且结构坚固
And it has a solid structure.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
Structures built on strong rock generally need no foundation since rock is usually as strong as concrete, and goes much deeper.
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