a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators
quartz crystals的用法和样例:
例句
Quartz crystals are seldom used in such handsets. 石英晶体是很少使用这种手机。
Quartz crystal is perfectly crystallized. 石英晶体是完美的结晶。