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。

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As for larger atomic clocks, current models measure the interaction of microwaves with electrically charged atoms, or ions, to measure one second.

对于较大的原子钟而言，当前的方法是以测量带电原子或离子发出的微波干涉方法确定一秒种的长度。

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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.

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