在分析中，上部结构用空间子结构法分析，而分层土用分层总和法求其刚度。
The space substructure method is used to analyse the space frame, and the finite layer summation method is used for the layered soil.
科学家们在一块六英里见方的试验田内进行了勘测，他们发现那些有机碳来自筑造防洪大堤取土用的浅塘，有机碳化合物沉淀至塘底并慢慢渗入地下。
Using a six-square-mile test plot, they found that the organic carbon comes from shallow ponds that were dug to provide soil for flood protection.
它是用管土刷白的。
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