So, to say we're traveling light is possibly a little understatement!

所以，要说我们是轻装上阵是有点夸张了！

Louis realized that there were advantages in traveling light and not having too many possessions clinging to you.

路易斯这才知道轻装旅行，不带那么多的东西一起飞要容易得多。

You might consider traveling light next time, ma'am.

司机：女士，下次您可以考虑轻装上阵。

One of the first assumptions we make is that the light is traveling from the sun to you, in a straight line.

我们做出的第一个假设是光以直线从太阳传播到我们。

It's also interesting to know that a few years ago researchers in Scotland were able to slow the speed of light traveling through free space.

有趣的是，几年前苏格兰的研究人员能够减慢光在自由空间中的传播速度。