And alpha is something that we can measure at distant places in the universe and thereby back in time by looking at these atomic spectral lines.
我们可以在宇宙里遥远的地方测量阿尔法常数，从而通过研究这些原子光谱线回到过去。
Physicists have no trouble using, on the one hand, picoseconds (trillionths of a second) or even femtoseconds (quadrillionths of a second) to discuss time at the atomic scale.
在讨论原子级别时间的时候，物理学家用起皮秒（百万兆分之一秒）甚至飞秒（千万亿分之一秒）来都没任何不便。这是一方面。
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。
But, at the same time, we do know about the atomic theory of matter.
但是，同时我们也知道，物质的原子理论。
Optical atomic clocks oscillate much faster, at about 500, 000 billion cycles per second, and thus divide time into smaller units.
光学原子钟振动的速度快得多，大约每秒500万亿次，因此把时间分成了更小的单元。
This causes a shorter contact time at the hot-filament or in the plasma zone and therefore a lower concentration of atomic hydrogen.
这使得它在热丝带或等离子带中的接触时间较短，从而导致原子态氢浓度较低。
Based on the requirement for establishing coordinated atomic time scale at Shangha1 Observatory, the application of ARIMA model to the forecasting of atomic time was discussed.
根据上海天文台协调原子时尺度建立的要求，探讨了ARIMA模型在原子时预报中的应用。
Based on the requirement for establishing coordinated atomic time scale at Shangha1 Observatory, the application of ARIMA model to the forecasting of atomic time was discussed.
根据上海天文台协调原子时尺度建立的要求，探讨了ARIMA模型在原子时预报中的应用。
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