Soil Cd土壤Cdsoiln.土地；土壤；污物，粪便v.弄污soil-concrete medium土壤-混凝土介质soil heat conductivity土壤导热率soil water diffusivity土壤水(份)扩散率soil-cement strength水泥土强度soil thermal diffusion土壤热扩散soil aggregate mixture土集料混合物soil-inhabiting alga土壤藻类soil degradation index土壤退化指数soil of glacial origin冰川生成土Soil quality partition土壤质量分区

1. The reason of air distribution being asymmetric is that the penetrability of the field soil is not uniform.
   现场曝气存在气流分布不对称现象，是由于土壤介质的渗透性不均匀所致。