这些原子钟的时间是协调世界时(utc)的基础，在1972年协调世界时开始成为全球商务活动的依据。

These clocks are the basis for Coordinated Universal Time (UTC), which in 1972 became the basis for global commerce.

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这样芯片大小的原子钟即使在全球定位系统被阻断的情况下也能继续使用，如此这般，原子表在深入地下或水中时尤其有用。

A CSAC clock continues to function when GPS signals are blocked, making it incredibly useful deep underground or underwater.

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另一项研究显示，当把原子钟用于火箭，发射到离地面1万公里以上的高空时，由于那里的地球引力场较弱，而略微有所加快。

Another showed that an atomic clock sped up when launched on a rocket 10,000 kilometres above Earth's surface, where the planet's gravitational field is weaker.

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另一项研究显示，当把原子钟用于火箭，发射到离地面1万公里以上的高空时，由于那里的地球引力场较弱，而略微有所加快。

Another showed that an atomic clock sped up when launched on a rocket 10,000 kilometres above Earth's surface, where the planet's gravitational field is weaker.

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