natural soil短语¹⁴⁴⁹⁷²⁺² 基本例句 天然污垢 土壤害虫 Through the comparison of test results of natural soil samples cut from different direction, the anisotropy of natural soils which becomes obvious as strain decreases is illustrated. 通过不同方向切样的原状土试验结果对比，反映了原状土体存在明显的各向异性，结构性引起的各向异性在应变越小时越明显。 cnki