The speed of light is the ultimate speed limit in the Universe — if you're traveling through space.

光的速度是宇宙中的终极速度限制——如果你在太空中旅行的话。

But if you could somehow spend a good amount of time hugging close to that ultimate speed limit in the universe, the slower your clock will run.

但如果你能以某种方式，花大量时间接近宇宙中的终极速度极限，你的时钟就会运行得越慢。

The Special Theory of Relativity, published in 1905, brought forth the revolutionary concepts of space-time and the speed of light as an ultimate speed limit.

1905 年发表的狭义相对论提出了时空和光速作为极限速度的革命性概念。