quartz
英 [kwɔːts] 美 [kwɔːrts]
n.
石英
复数： quartzs
例句
Quartz timepieces are very accurate, to a minute or two per year.
石英钟表走时非常准，年误差仅为一两分钟。
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。
Today, quartz crystal clocks are generally used on the seismograph stations.
目前，地震台站一般采用石英晶体钟。
