1. The quartz in his pocket made little sound. 口袋里的石英发出的声音很小。
2. 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。
3. What we do know is that the earliest lenses were made from quartz and were usually set into bone, metal, or leather. 我们所知道的是最早的透镜是用石英做的，通常它们被放置在骨头、金属或者皮革中。
英英解释
n.
1. colorless glass made of almost pure silica
2. a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especial
