1. Silicon dioxide is a common mineral found in rocks and sand.
硅二氧化物是一种常见的矿物，存在于岩石和沙中。

2. Many electronic devices contain silicon dioxide as a key component.
许多电子设备中含有硅二氧化物作为关键组成部分。

3. Silicon dioxide is used in the production of glass and ceramics.
硅二氧化物用于玻璃和陶瓷的生产。

4. The chemical formula for silicon dioxide is SiO2.
硅二氧化物的化学式为SiO2。

5. Silicon dioxide is known for its high melting point and hardness.
硅二氧化物以其高熔点和硬度而闻名。

6. In nature, silicon dioxide can be found in the form of quartz and sand.
在自然界中，硅二氧化物以石英和沙的形式存在。