1.
1. 双光眼镜 双焦镜片 双筒望远镜玻璃：bifocallens 双焦点透镜 双焦镜 双焦透镜 | bifocals 双光眼镜 双焦镜片 双筒望远镜玻璃 | bifocalsegment 双焦面
2. 双光眼镜：nowadays 现在 | bifocals 双光眼镜 | develop 研制
3. 双焦点; 双光眼镜 (名)：bifocal 双焦点的 (形) | bifocals 双焦点; 双光眼镜 (名) | biforate 有双孔的 (形)
1. 双光眼镜；远近两用眼镜
Bifocals are glasses with lenses made in two halves. The top part is for looking at things some distance away, and the bottom part is for reading and looking at things that are close.
e.g. Mrs Bierce wears thick bifocal lenses.
比耶尔斯太太戴着厚厚的双光眼镜。
noun
1. eyeglasses having two focal lengths, one for near vision and the other for far vision