名詞 speed of light:

1. the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
   同義詞：light speed, c

1. The speed of light being extremely great, we cannot measure it by ordinary method.
   由于光的速度非常大，我們不能用普通的方法度量。
2. The symbol for the speed of light in a vacuum.
   表示真空中光速的物理符號
3. The great speed of light explained why when we turn on a lamp in a dark room, the lamp and everything else in the room seem to light up at once.
   巨大的光速解釋了為什么當我們在黑暗的房間里打開電燈時，燈和房間里的一切都似乎立即亮起來。
4. Because of the great speed of light, we see a lamp light up almost at the exact moment we turn it on.
   由于光速極快，我們幾乎能在開燈的那一瞬間就看見電燈亮起來。