英语语法分析

Nowadays, these glasses are known as bifocals.

如今，这被称为双光眼镜。

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。

I’m thankful that women my age will need bifocals to see the chin hairs that they missed plucking.

我对象我这般年纪的妇女需要双光眼镜才能看清下巴上漏拔的毛发而表示感谢。