Luc,Lum---light
A number of luminaries,including a Novel prize winner and two leding authors,will be present.
很多名人，包括一位诺贝尔奖得主及二位首屈一指的作家都将出席。
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。
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。
With this watch you can tell time in the dark because its hads and dial are luminous.
用这只表你可以在黑暗中看时间，因为它的针和针盘都是会发亮的。
Lamp shades are translucent bu tnot transparent.
灯罩是半透明而不是全部透明的。