A reading stone was an approximately hemispherical lens that was placed on top of text to magnify the letters so that people with presbyopia could read it more easily. Reading stones were among the earliest common uses of lenses.
双语例句
1
Another solution was something called a "readingstone".
另一种解决办法是一种被称之为“阅读之石”的东西。
2
But start reading and you quickly discover that author Gene Stone dives into the heart of each of these old standbys — and comes up with a pearl every time.
但是开始阅读的时候你很快就会发现作者吉恩斯通可以从这些旧思想中挖掘出珍珠来。
3
By reading English articles, you can kill two birds with one stone. You can improve your English and learn more foreign cultures.