powder/solid/liquid/gas/power/powerful/tower/towel
记忆：
1. powder [ 5paudE ] n. 粉, 粉末, 火药 Will you please fetch me a bag of washing powder?请你去给我取袋洗衣粉来，好吗？
2. solid [ 5sClid] n. 固体, 立体 adj. 固体的, 实心的 Of course the house is solid.房子当然是固体。
3. liquid [ 5likwid ] n. 液体 adj. 液体的 Iron can become liquid when heated continuously. 不停地加热，铁能变为液体。
4. gas [ ^As] n. 气体 Gas is the most active state of matter. 气体是最活跃的物质状态。
5. power [ 5pauE] n. 能力, 力量, 动力, 权力 China has no intention to become a power state. 中国不想成为超级大国。
6. powerful [ 5pauEful ] adj. 强大的, 有力的 Without a powerful army there will be no powerful defense. 没有强大的军队就没有强大的国防。
7. tower [ 5tauE ] 音“塔”，n. 塔, 城堡 To save a life is better than to build a seven-story tower. 救人一命，胜造七级浮屠。
8. towel [ 5tauEl, taul ] n. 手巾, 毛巾 Here is a towel for you to wipe off your sweats. 你用这块毛巾擦汉吧。
另类阅读：
The worker used the electric power to grind the corn into powder in the tower. From time to time, he wiped his sweats off with a towel. He knew that corn is solid, sweats are liquid and the air he breathed is gas.