英语词汇“principal focus”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	principal focus
释义	WordReference Random House Unabridged Dictionary of American English © 2024 prin′cipal fo′cus, [Optics.] OpticsSee focal point (def. 1). 1825–35
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