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hypolimnion
[hypolimnion 词源字典]
"The lower layer of water in a stratified lake, typically cooler than the water above and relatively stagnant", Early 20th century: from
hypo-
'below' + Greek
limnion
(diminutive of
limnē
'lake').
[hypolimnion etymology, hypolimnion origin, 英语词源]