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。

For example, we have Quartz crystal clocks and watches accurate to within one minute a year.

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“水晶共振” 次谐波频率的石英水晶。

The Crystal Resonator". A subharmonic of the frequency of quartz crystal."

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阿肯色州和巴西集合了地球上两个最大的石英水晶体和相关的宝石形式，是这项号召的关键。

Arkansas and Brazil are composites of the two greatest masses of quartz crystal and associated gemological forms on the planet, and are key to this call.

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