The wonderful loess lands , which cover much of kansu , shensi , ninghsia , and shansi provinces , account for the marvelous fertility of these regions ( when there is rainfall ) , for the loess furnishes an inexhaustible porous topsoil tens of feet deep 这一令人惊叹的黄土地带，广及甘肃、陕西、宁夏、山西四省的大部分地区，雨量充分的时候异常肥沃，因为这种黄土提供了无穷无尽的、有几十英尺深的多孔表土层。
Underneath the surface was a layer of sedimentary yellow soil , which was regarded as coming from somewhere else . it was found that some of the rock materials was the same as on the walkway , which shows that this soil layer had some connections with the the reforming of the pedestrian walkway 表土层底下露出黄褐色堆积土层，属外来堆土，其中还发现几片与地表人行步道上的板岩片相同材质的遗留，显示该土层应与整修人行步道有关。
The results showed that soil erosion were found affecting 29 . 83 % of the total land area or 55 . 94 % of the cultivated area , resulting in the loss of 9 . 1674 million tons of soil from the surface layer of the land , which has already seriously affected the life and production of the local people 结果表明，该地区国土面积的29 . 83 % 、耕地面积的55 . 94 %己经产生了水土流失，年流失表土层总量达916 . 74万t ，已对当地人民的生产生活产生了严重影响。
The results show that ( 1 ) the unconsolidated confined aquifer plays a crucial role in load transfer because of its fluidity and replenishment in time , making the loads of overburden soil evenly transfer into the bedrock through the unconsolidated confined aquifer and the load keep constant during the excavation process ; ( 2 ) under the condition without unconsolidated confined aquifer , the load on the bedrock will be reduced sharply during the excavation 研究结果表明：松散承压含水层条件下，由于承压水的流动性和补给作用，上覆表土层的载荷通过松散承压含水层均匀地作用于下部基岩上，开挖过程中基岩顶界面上的载荷基本保持恒定，松散承压含水层起到均匀传递载荷的作用；无松散承压含水层时，作用在基岩顶界面上的表土层载荷随煤层开挖而显著降低。
On the contrary , the degree of saturation plays an important role on p - wave propagation , if incidence is 90 degree . the amplification factor on surface related to the response of bedrock is the biggest if the media is one - phase media , and the factor is the smallest if the media is unsaturated media ( sr > = 90 % ) P波从底边界垂直入射时，饱和度对地表土层的反应有显著的影响。就地表土层位移和加速度相对于基岩的放大倍数来说，一般有这样的规律：单相土的放大倍数最大，欠饱和土的放大倍数最小，饱和土的放大倍数居中。
