subsoils and foundations 地基与基础
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N-UNCOUNT The subsoil is a layer of earth that is just below the surface soil but above hard rock. 下层土; 底土 [also 'a' N]
...the chalk subsoil on the site.
...工地的白垩底土。
In a solid which is moderately low in available zinc, deep cuts may expose zinc-deficient subsoils.
土壤中含有效锌转低时，深层耕翻会使缺锌的底土暴露出来。
Sorrow is God's plowshare that turns up and subsoils the depths of the soul, that it may yield richer harvests.
忧愁是神的犁头，掘到土的深处，地就能多结果子。
Soils start to dry from the surface but subsoils may remain wet so that rice roots can absorb available water.
土壤由表面开始干燥，但底土潮湿，因此，水稻能吸到有效水。
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