英语词汇“penumbra”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	penumbra
释义	penumbrapenumbra /pəˈnʌmbrə/ noun [countable] Etymology ETYMOLOGYpenumbra Origin: 1600-1700 Modern Latin Latin paene almost + umbra shadow science, physics a slightly dark area between full darkness and full light
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