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)

noun

1. eyeglasses having two focal lengths, one for near vision and the other for far vision