Which was limited by how fast someone could travel.

这受人的移动速度限制。

So I'm going to read a little bit here and find how many times faster it traveled.

所以我要读一点，然后看看它比它快多少倍。

Officials are trying to determine how fast each train was traveling at the time and what caused the crash.

官员们正试图查明撞击时两辆火车的运行速度以及事故起因。

They would comment on how fast they were traveling, and they weren't at all sure the human body could sustain this.

人们不停议论着极速的旅程，他们从不知道人类能够承受 这样的速度极限。

And how fast do these waves travel?

这些波的传播速度有多快？

Policeman: Do you know how fast you were traveling back there?

警察：你知道你回去的速度有多快吗？

Mechanization meant superior harvests and more food, mass produced goods, cheaper and faster travel and communication, and usually a better quality of life.

机械化代表着优越的收成，更多的食物，和大规模生产的货物更加便宜和快速的旅行和通讯，和通常更好的生活品质。

It shows the path the jet is taking and how fast it is travelling.

它显示了喷气式飞机所走的路径以及它的行进速度。

So, we’re basically saying, if the manhole cover was here, and then one millisecond later it was here, how fast did it travel?

所以，我们基本上是说， 如果井盖在这里， 一毫秒后它又在这里，它移动的速度有多快？

Communicate faster, but also work faster, bank faster, travel faster, find a date faster, cook faster, clean faster and do all of it all at the same time?

沟通更快，工作也更快，银行业务更快，旅行更快，约会更快，做饭更快，打扫更快，同时做所有这一切？

And if you wanted to communicate with somebody back at home, it would take a message about two and a half seconds to travel between you and them since that's how fast the speed of light can travel at.

如果你想和家里的人交流，信息在你和他们之间来回传播大约需要两秒半的时间，因为这是光的的传播速度。

But the grit in the pearl for all this was a strange observation made that year by two researchers called Albert Michelson and Edward Morley that the speed of light was constant, no matter how fast the observer was travelling.

然而，白璧微瑕，当年阿尔伯特迈克耳孙（Albert Michelson）和爱德华莫雷（Edward Morley）两人测得一个诡异的实验结果，即光速在不同的参考系中是一样的。