单词	Bertrand lens
释义	Bertrand lens noun : an auxiliary removable lens in the tube of a polarizing microscope used to obtain interference figures Word History Etymology probably after Joseph L. F. Bertrand
随便看	premoral premorse premortuary premotion premotions premove premoved premovement premovements premoves premoving premundane premune premunire premunite premunition premunitions premunitory pren prename prenames Prenanthes prenantheses prenanthesses prenares

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