psamment是什么意思

用法例句

Based on the diagnostic horizons and diagnostic characteristics, with soil genetic theory as guide, the taxonomic classification of sandic entisols in China was discussed in this paper.

以土壤的诊断层和诊断特性为依据 ,以土壤发生学作指导 ,阐述了我国砂质新成土的系统分类。