bifocals
n.
"bifocal spectacles," 1899, see bifocal. Conceived by Benjamin Franklin, but called by him double spectacles.
| 词汇 | bifocals | 
| 词根词缀 | Online Etymology Dictionary bifocals n. "bifocal spectacles," 1899, see bifocal. Conceived by Benjamin Franklin, but called by him double spectacles. | 
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