bifocals的例句大全

Calculation of minimum central thickness of fused-bifocals

论熔合双光镜最小中心厚度的计算方法

He brought us bifocals and the lightning rod,

他发明了双光眼镜和避雷针，

I rang the bell, and a geeky, middle-aged man in bifocals stuck his head around the door.

我按响了门铃，一个头上架着变焦眼镜，看起来一付科技痴汉模样的中年男子从门后探出头来。

Occasionally, children who have crossed eyes may need to have bifocals to help control the crossing.

偶尔有内斜视的孩子会需要双光镜来控制内斜。

Take care when stepping on and off the escalator; take extra care if you wear bifocals.

在上下扶梯的时候一定要留神，尤其是当你还戴着眼镜的时候。

Nowadays, these glasses are known as bifocals.

如今，这些眼镜被称作双光眼镜。