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.
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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