翻译下句子：it is practically certain that．．．

it is practically certain that plans were made for the building of the pyramids because the plans of other large works have fortunately been preserved.

毫无疑问，金字塔（或金字塔形的建筑）的建造是有设计图（计划）的，因为其它大型工程的设计图（计划）都被保存下来了。

具体是怎么翻译看文章情况。

事实上,金字塔的建造肯定是有计划书的,因为其他大型工程的计划书幸运地保存下来了. 再看看别人怎么说的。