bifocal

a. 双焦的
【医】 双焦点的

名词:bifocalism 

bi.fo.cal

adj.（形容词）
Having two focal lengths.
双焦距的
Having one section that corrects for distant vision and another that corrects for near vision, as an eyeglass lens.
双光的：一个矫正远视而另一个矫正近视的，如眼镜
Embodying two distinct and often conflicting goals, interests, or courses of action:
包含两个不同的并且经常是矛盾的目的、兴趣或一系列行为：
例句：
.a smoothly functioning bifocal mind.(John McPhee).A bifocal monetary policy . . . has kept one eye on the money supply and the other on interest rates.(Edward Meadows)
.顺利进展着的两种想法.(约翰·麦克菲).双轨财政政策…一面着眼于资金供给，另一方面着眼于利率.(爱德华·梅多斯)

pl.n.（复数名词）
bifocals

Eyeglasses with bifocal lenses.
双光眼镜

【引伸】
bifo.calism
n.（名词）