英语词汇“nocturnal arc”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	nocturnal arc
释义	WordReference Random House Unabridged Dictionary of American English © 2024 noctur′nal arc′, [Astron.] Astronomythe portion of the diurnal circle that is below the horizon of a given point. Cf. diurnal arc. 1695–1705
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