n.双光眼镜(上半為近視鏡片，下半為遠視鏡片)
bifocal的复数

原形：bifocal

I need to get bifocals; I'm having trouble reading both my book and the computer screen.
我需要配一副双焦眼镜，看书和电脑屏幕都有点困难。
My grandfather wears bifocals so he can see both near and far without switching glasses.
我爷爷戴双焦眼镜，这样他不用换眼镜就能看远又看近。
The optometrist recommended bifocals for me since I require different prescriptions for distance and reading.
眼科医生建议我戴双焦眼镜，因为我对远视和阅读需要不同的度数。
She started using bifocals after turning 40, as her eyesight began to change.
她40岁后开始使用双焦眼镜，因为她的视力开始变化。
Bifocals have a distinct line dividing the two sections for distant and close vision.
双焦眼镜有两个明显的分割线，区分远视和近视的部分。
With bifocals, you don't have to constantly remove your glasses to read or look at something far away.
有了双焦眼镜，你不必总是摘下眼镜来阅读或看远处的东西。
John couldn't adjust to his new bifocals at first, but now he finds them quite convenient.
约翰一开始不习惯他的新双焦眼镜，但现在他觉得它们非常方便。
Bifocal contact lenses are an alternative for those who don't want to wear traditional bifocal glasses.
对于不想戴传统双焦眼镜的人来说，双焦隐形眼镜是一个选择。
The cost of bifocals can vary depending on the frame and lens material.
双焦眼镜的价格根据镜框和镜片材料的不同而变化。
She opted for progressive bifocals, which have a seamless transition between the different focal points.
她选择了渐进式双焦眼镜，这种眼镜在不同焦距之间有平滑的过渡。