flint optical glass

例句：

1. 1. The flawless optical glass is the perfect choice for a high-end display screen.
   无瑕的光学玻璃是高端显示器屏幕的理想选择。
2. 2. This flint optical glass is highly resistant to scratches and can last for many years.
   这种燧石光学玻璃非常抗刮擦，可以使用很多年。
3. 3. The flawless optical glass is used in the manufacture of high-quality lenses and mirrors.
   无瑕的光学玻璃用于制造高质量的透镜和镜子。