And their results show that the brain does not use a single stopwatch. Instead, it has several ways to tell time, and none of them seems to work like a conventional clock.

结果他们发现，大脑并不是只依赖一部生理时钟来工作，相反，它借助很多办法进行报时，其中却没有任何一种类似于人类使用的传统时钟。

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Based on available frequency standards: one prototype laboratory model of cesium clock, three hydrogen clocks and several (2-6) rubidium clocks, the SO atomic time scale has been established.

利用我们现有的标准，一台试验型实验室铯束标准，三台氢原子钟以及若干台(2 - 6)铷气泡标准来建立原子时尺度。

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Mr Vajpayee has in effect turned the clock back to February 1999, when Kashmir was just one of several subjects on a broader agenda for improving Indo-Pakistani relations.

ECONOMIST: Talking about Kashmir | The

For the last several years, as clock speeds have inexorably ramped up, the one-gigahertz barrier has for computer buffs taken on the significance of the sound barrier or the four-minute mile.

CNN: Life at One Gigahertz