1·To this class of substance belong mica, porcelain, quartz, glass, wood, etc.
属于这类物质的有云母、瓷器、石英、玻璃、木材等等。
—— 《新英汉大辞典》
2·European monks would take a piece of clear rock, often quartz, and place it on top of the reading material.
欧洲的僧侣们会拿一块透明的石头，通常是石英，放在阅读材料的上面。
3·Silicates such as mineral quartz drifted downward and mixed with denser materials as they reached Earth's core.
石英等硅酸盐向下漂移，在到达地核时与密度更大的物质混合。
4·Rocks like quartz, well, quartz of optical quality weren't cheap.
具有像石英这样的光学品质的石头并不便宜。
5·For example, we have Quartz crystal clocks and watches accurate to within one minute a year.
例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。