英语词汇bifocals的起源、历史背景-英语词源词典

词汇	bifocals
词源	bifocals n. "bifocal spectacles," 1883, bi-focals; see bifocal. Invented by Benjamin Franklin, but he called them double spectacles. Entries linking to bifocals bifocal adj. "having two foci," 1844; see bi- "two" + focal. trifocals n. 1899, from bifocals with tri-. updated on May 26, 2017
随便看	emulgent emulous emulsification emulsifier emulsify emulsion en en- *en -en enable enabler enact enactment enamel enamor enamored enamour en bloc encamp encampment encapsulate encapsulation encase encaustic

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bifocals n.