表土的腐殖质含量 humus content of topsoils
土地的表层 layer of soil
混凝土表面的浮浆层 laitancecoating
代表性土样的确定方法 method for representative soil sample determination
实验表明：净风对土表的风蚀作用微弱，即使在遭到大风吹刮时，土表的结壳仍不易受到破坏。
The experiment indicates that wind itself is of weak effect on ground surface erosion, so that the soil crust may not be destroyed even under great wind velocity.
为了能够维持生命，这个新的星球不仅要有液态水，而且它的土表还必须是固态的，就像地球这样。
To be able to support life, the new planet would need not only to have water, but it would also need to be solid.
因此，在铁路桥涵设计规范中，原有的地基承载力表已不能使用，需对新标准中各种细粒土的承载力重新进行研究。
Therefore, the used bearing capacity tables in the criterion of railway bridges and culverts foundation designing are out of date.
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