| 单词 | lethargic |
| 释义 | lethargy /lethˈər-ji/noun
ORIGIN: Gr lēthārgiā drowsy forgetfulness, from lēthē forgetfulness, and ārgos idle lethargic /-ärˈ/ or letharˈgical adjective
letharˈgically adverb lethˈargied adjective lethˈargize or lethˈargise transitive verb lethargy of neutrons noun The natural logarithm of the ratio of initial and actual energies of neutrons during the moderation process |
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