The subsoil is a layer of earth that is just below the surface soil but above hard rock.
例句
...the chalk subsoil on the site.那個(gè)工地的白堊底土
英漢詞典釋義
n.
(土壤的)底土,心土
Earthworms burrow deep into the subsoil.蚯蚓深深地鉆進(jìn)底土。He embedded the pilings deep into the subsoil.他把樁深深打進(jìn)地基下的土中。Some movement in the building will occur as it settles into the subsoil.樓房沉到下層土?xí)r，樓里就會(huì)有動(dòng)靜。
英英詞典釋義
Noun
1. the layer of soil between the topsoil and bedrock