英语语法分析

Results showed the arsenic can be quickly absorbed onto loessial soil and reach adsorption saturation.

研究结果表明，黄土性土壤对砷是一次性的吸附净化并达到饱和状态。

For Cultivated Loessial Soil, Dark Loessial Soil and Yellow-brown Soil, the advance distance decreased as silt content increased.

随土壤深度增加，土壤中原油残留物的含量呈波动递减趋势。

The dark loessial soil (Heilutu) is not only a main zonal soil group in the loess plateau of northwestern China, but an ancient cultivated soil.

黑垆土是我国西北黄土侵蚀地区主要的地带性土类，也是一种古老的耕种土壤。