bifocal

双焦点的英释中释adjhaving two different focuses

1 He had beautiful skin, with rosy cheeks, blue eyes, rimless round bifocal spectacles, resting on the tip of his nose..他皮肤很好，面颊红润，眼睛深蓝，鼻梁上架着一副无框双焦眼镜。

2 The entire arrangement makes it easy for this bifocal fish to spot a tasty bug flying above the water, or a bit of algae below..这个构造使四眼鱼能够很轻松地发现一只从水面飞过的美味的虫子，或者水面下的一点水藻。

3 He also made the first pair of bifocal glasses and invented a musical instrument called the glass harmonica and the stepladder chair..他还制作了双光眼镜，以及自己命名为玻璃口琴的乐器和活动梯子。