soil suborder是什么意思

用法例句

Distribution of polycyclic aromatic hydrocarbons (PAHs) in the surface and subsurface soils in Cixi County;

慈溪市农田表层、亚表层土壤中多环芳烃(PAHs)的分布特征

Owing to accumulation effect, heavy metal pollution of soil subsystem in the city is becoming more and more serious.

本文仅就太原土壤亚系统中的Ｃｄ污染进行了研究。