crystal clock的用法和樣例：
例句
- Today, quartz crystal clocks are generally used on the seismograph stations.
目前，地震臺站一般采用石英晶體鐘。 - There is a gold quartz clock near the wood shutter.
木制的百葉窗旁?huà)熘?zhù)一個(gè)金黃色的石英鐘。 - The time base was given both by a crystal clock and the broadcast standard signals.
時(shí)間標準是由石英鐘和廣播標準信號提供的。
