n.X光照片；vt.照X光；

candle/light/ray/X-ray/electricity/battery/power/kerosene/gas
记忆：
1. candle can-dle音“看”，蜡烛发光后就可以看了，n. 蜡烛 The light of candles can create a romantic atmosphere. 烛光能营造一种浪漫的气氛。
2. light n. 光, 灯adj.轻的, 浅的vt. 点燃, 照亮 In the dark the lighted cigarette gives off some weak light.在暗中点燃的烟头发出一些微光。
3. ray n. 光线 The rays of the morning sun come through the window, making the room bright.清晨的阳光穿过窗户照亮了房间。
4. X-ray n. X光 X-ray is often applied to medical examinations. X光常用于体检。
5. electricity n. 电 Electricity has long become a must in today’s everyday life. 很久以来电就成了日常生活中不可缺少的东西。
6. battery n. 电池 It’s a pity that my battery can’t last long.我的电池用不了多久，真遗憾！
7. power n. 能力, 力量, 动力, 权力 Another power station is being built on the Jinsha River.金沙江上将修建另一座电站。
8. kerosene n. 煤油 Now few people use kerosene in their daily life.现在没多少人在生活中使用煤油了。
9. gas n. 汽油，天然气 More and more people cook with gas, for it is convenient.越来越多的人用天然气做饭，因为它很方便。
另类阅读：
In order to get light, people used kerosene and gas in the near history, but candles are more often used throughout the history, and even today when electricity is off and we have no batteries, we still need the ray it gives off.