英语词汇“segment of a bifocal lens”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	segment of a bifocal lens
释义	DictionarySeeportion segment of a bifocal lens segment of a bifocal lens (seg) An area of a bifocal lens of a power different to that of the main portion. Syn. portion. There is the distance portion, which has the correction for distance vision, and the near or reading portion, which has the correction for near vision. See intermediate portion.
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segment of a bifocal lens