動詞 light up:

1. start to burn with a bright flame
2. make lighter or brighter
   同義詞：light, illume, illumine, illuminate
3. become clear
   同義詞：clear up, clear, brighten
4. ignite
5. begin to smoke
   同義詞：fire up, light

1. 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(dāng)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。
2. The fire lit up her face.
   爐火照亮了她的臉。
3. 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。
4. A brilliant sun lit up their rooms.
   燦爛的陽光照亮了他們的屋子。