bifocals

n [pl] spectacles with bifocal lenses 双光眼镜: a pair of bifocals 一副双光眼镜.

bicarb, bicarbonate, bicarbonate of soda, bicentenary, bicentennial, bicker, bicycle, bicycle-clip, bicyclist, bid, biddable, bidder, bidding, bide, bidet, biennial, biennially, bier, biff, bifocal, bifurcate, bifurcation, big, big bang hypothetical, Big Brother, big business, big dipper, big end, big game, big top, big wheel, big-head, big-hearted, bigamist, bigamous, bigamously, bigamy, bight, bigness, bigot,