而这次的研究则是第一次用实验证明，在单个光子层次上也存在着光前驱，而且它们也是单个光子的波包中最快的部分。

But this study is the first to experimentally show that optical precursors exist at the single-photon level, and that they are the fastest part of the single-photon wave packet.

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总而言之，两支队伍发现了超过50颗遥远超新星，它们所发射出的光不如预计的那么明亮，这就意味着宇宙的膨胀速度正在加快。

All in all, the two research teams found over 50 distant supernovae whose light was weaker than expected - this was a sign that the expansion of the Universe was accelerating.

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人类可见的物质只占到整个宇宙总物质的17%，剩下的83%是所谓“暗的”，意味着它们不会释出或反射可测光。

The matter we can see makes up just 17% of matter in the Universe; the remaining 83% is "dark", meaning it does not reflect or emit detectable light.

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