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BNC: 35255 COCA: 32521

substratum

Word family 
Related topics: Geology
sub·stra·tum /ˌsʌbˈstrɑːtəm $ -ˈstreɪ-/ noun (plural substrata /-tə/) [countableC]  
technicalHEG a layer that lies beneath another layer, especially in the earth 〔尤指土壤的〕下层，底（土）层
 a substratum of rock
底层岩石
 a social substratum
社会底层
Examples from the Corpus
substratum• A particular branch, the Grammatical Shastra, was formulated using the Sanskrit vocabulary as a substratum, with no ambiguity whatsoever.• Cultivation: An extremely undemanding plant as to its growing medium, and will grow almost in any substratum.• Cultivation: Very undemanding as to its growing medium, it will grow well on any substratum.• The distinction between substratum and entity also enables us to further specify the relations between Zeus and the world.• His books have tapped into a deep substratum of human religiosity.• Unlike the two previous species, this one prefers more organic content in its substratum.• They are suitable aquarium plants and are cultivated like Cryptocoryne species in a medium-rich substratum and water that is not too acid.• Research in other cell lines has suggested that the mechanical properties of the substratum are important in the maintenance of cellular differentiation.• The substratum of this experience is the mastery of a technique.
sub·stra·tum noun
Chinese
Syllable
Corpus
BNC: 35255 COCA: 32521
BNC: 35255 COCA: 32521
BNC: 35255 COCA: 32521
substratum
Layers and coverings: surface, cover, layer...
Features and qualities: feature, quality, factor...

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