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。

youdao

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。

youdao

You certainly don't do it with a tape measure, even if you had one that was accurate to atomic sizes.

当然咯，你不可能拿一把卷尺去测量，即便它是一把精确得可以测量原子的卷尺。

youdao

Unless Apple was using an atomic clock to measure the exact nanosecond of purchase, it is perhaps fair to say that their choice of Chunli Fu, from Qingtao, China, a week ago, was highly intentional.

FORBES: Winner of 25 Billionth Apple App Store Download was a Chinese Consumer, Coincidence?