英语词汇“free-space”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	free-space
释义	free-space free-space Refers to natural viewing conditions, that is viewing an object that is neither housed inside an instrument, (e.g. in a synoptophore), nor viewed through an optical system. Syn. open environment; true-space.
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