英语词汇“bertrand lens”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	bertrand lens
释义	bertrand lens noun Usage: usually capitalized B Etymology: probably after Joseph L. F. Bertrand : an auxiliary removable lens in the tube of a polarizing microscope used to obtain interference figures
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