bifocals是什麽意思

bifocals

英 [baɪ'fəʊkəlz] 美 [,baɪ'foklz]

n. 遠視近視兩用的眼鏡

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中文詞源

bifocals 雙光眼睛

前綴bi-, 二。詞根foc, 焦點，見focus.

英文詞源

bifocals (n.): "bifocal spectacles," 1899, see bifocal. Conceived by Benjamin Franklin, but called by him double spectacles.

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