Well, it goes with the speed of light, so in t seconds, it moves a distance cT.

它以光速前进，所以在T秒内，它前进了cT的距离。

youdao

Well, it goes with the speed of light, so in t seconds, it moves a distance cT.

它以光速前进，所以在T秒内，它前进了cT的距离。

youdao