substrata
n. 底土,下層土壤地基; 底層,下層( substratum的名詞複數 )
A substratum of something is a layer that lies under the surface of another layer, or a feature that is less obvious than other features.
...its deep substratum of chalk...
深厚的白堊地層
His recreation of the city is credible, with a substratum of fact to bolster the fiction.
他對該城歷史的再現是可信的,虛構的小說情節隱念著一些事實作為支撐。
There are substrata competition between the heterotrophic denitrification bacteria and ANAMMOX bacteria when organics the influent.
厭氧氨氧化汙泥中存在著異養反硝化菌,有機物的存在會導致其與厭氧氨氧化菌之間的基質競爭.