Thus time and time's relativity are measurable by any hourglass, alarm clock, or atomic clock that can measure a billionth of a second.

因此，时间和时间的相对性可以用任何沙漏、闹钟或原子钟来测量，其中原子钟可测量出十亿分之一秒。

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We've programmed it to match an atomic clock if the waterways continue to flow at their present rate.

我们给时钟编了程序，如果河流继续以现在的速度流动的话，那么就让它与原子钟相匹配。

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At the US Naval Observatory in Washington, its newest atomic clock is getting a climate-controlled room of its own for the first time.

在位于华盛顿的美国海军天文台，这里最新的原子钟首次得到了一个拥有空调的专用房间。

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Jerrold Zacharias at the Massachusetts Institute of Technology developed a practical atomic clock around the same time that Louis Essen and John Parry established the first atomic clock at the National Physical Laboratory in Teddington, west of London.

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That effectively means, for a few hundred bucks, Williams can turn it into an atomic clock that he could slip into his pocket.

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Inside, Williams explains, is a receiver tailored to make use of a signal from an atomic clock carried by a global positioning system satellite.

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