英语词汇“arc second”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	arc second
释义	WordReference Random House Unabridged Dictionary of American English © 2024 arc′ sec′ond, Astronomysecond² (def. 4). `Also, arc′- sec′ond.`
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