In the good ecosystems, the soil profile develops very well and stratifies obviously and its layer is deep; 良好生态系统的土壤剖面发育良好,层次分异较明显,土层较深厚;
A Research Concerning the Theory of Gradation in the Sampling Inspection on Raw Silk Part Six: The stratifies sampling error and the equivalent sample size 生丝抽样检验分级理论研究&Ⅵ.分组抽样误差及等效样本容量
With the innovation of socialism market economy, that society stratifies and the pattern of interests becomes divided make the china society transfer from oneness to diversity. 随着社会转型和社会主义市场经济体制改革带来的社会分层加剧和利益格局分化,中国正从单一性社会向多样性社会转型。
Practice has proved that the use of hierarchical and grouping teaching model stratifies the current situation of vocational education students. This model also could take the individual differences of students sufficiently and make full use of individual differences to promote students 'learning. 实践证明,中职数学教学中采用分层分组合作教学模式,符合当前中职学生的学情特点,能最大限度地考虑学生的个体差异,并充分利用个体差异促进学生学习。
A entire informationize system stratifies into two aspect, business tier and implement tier. 一个完整的信息化系统分为业务层和工具层两个方面。