1. 照亮;点(烟)：throw light on sth. 解释,阐明 | light up 照亮;点(烟) | make light of 轻视,藐视

2. 照亮; (脸上)呈现高兴的情绪：eat up 吃光 | light up 照亮; (脸上)呈现高兴的情绪 | look up 抬头看; 查找; 好转

3. (变亮;使容光焕发)：I will keep this in mind for future reference.(我会记住这个,供以后参考. ) | 6.light up(变亮;使容光焕发) | Her face lighted up when she heard the news.(听到那个消息,她面露喜色. )

4. 照亮;使放光彩; 点上(烟等)吸起来：translation n.翻译;译文 | light up 照亮;使放光彩; 点上(烟等)吸起来 | come into being 出现;形成;产生

1. 照亮；发亮
If you light something up or if it lights up, it becomes bright, usually when you shine light on it.

e.g. ...a keypad that lights up when you pick up the handset...
拿起听筒就会发亮的电话键盘
e.g. On September 5, at the end of the festival, a massive display of fireworks will light up the sky around Broadlands.
9月5日，也就是庆祝活动的最后，会有大型焰火表演照亮布罗德兰附近的夜空。

2. 现出吃惊的神情；露出喜色
If your face or your eyes light up you suddenly look very surprised or happy.

e.g. Sue's face lit up with surprise...
她一脸惊诧。
e.g. You should see his eyes light up when he talks about home.
你真该看看他谈到家的时候眼睛放光的模样。

3. 点烟；开始吸烟
If you light up, you make a cigarette, cigar, or pipe start burning and you start smoking it.

e.g. He held a match while she lit up...
他拿了根火柴为她点烟。
e.g. He took his time lighting up a cigarette.
他不慌不忙地点了一支烟。

verb

1. make lighter or brighter

e.g. This lamp lightens the room a bit

Synonym: lightillumeillumineilluminate

2. begin to smoke

e.g. After the meal, some of the diners lit up

Synonym: fire uplight

3. start to burn with a bright flame

e.g. The coal in the BBQ grill finally lit up

4. ignite

e.g. The sky lit up quickly above the raging volcano

5. become clear

e.g. The sky cleared after the storm

Synonym: clear upclearbrighten