英语词汇“principal point”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 point
释义	WordReference Random House Unabridged Dictionary of American English © 2024 prin′cipal point′, [Optics.] Opticsthe point where a principal plane intersects the axis. 1695–1705
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