Group10 Luc, Lum-light
“光”
elucidate
adj. 说明　
I asked the teacher to elucidate a point that was not clear to me.
我请老师说明一点我不大明白的地方。
lucid
adj. 明白的；易懂的　
To obviate misunderstanding, state the directions in the most lucid way possible.
为了避免误解，尽可能明白地说明。
luminous
adj. 发亮的　
With this watch you can tell time in the dark because its hands and dial are luminous.
用这只表你可以在黑冶中看时间，因为它的针和针盘都是会发亮的。
transparent
adj. 半透明的　
Lamp shades are translucent but not transparent.
灯罩是半透明而不是全部透明的。