hypolimnionyoudaoicibaDictYouDict[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]