| 释义 |
〔substratum〕A layer of earth beneath the surface soil; subsoil.下层土:位于表层土下方的泥土层;下层土〔subsoil〕The layer or bed of earth beneath the topsoil.心土或下层土:位于表层土下面的泥土层〔undersoil〕Soil below the ground surface.下层土:地面下的土壤〔subsoil〕To plow or turn up the subsoil of.挖松或翻起下层土 |