1·Teachers prepared a number of props: an iron bar, a handkerchief, a piece of paper and a bottle of alcohol, there is a pot filled with water basin.
老师准备了许多道具：一根铁棒、一块手帕、一张纸和一瓶酒精，还有一盆装满水的盆。
2·More men were knocked down by the iron bar.
更多的人倒在她的铁棒下。
3·In consequence of heating, the length of the iron bar increased.
由于受热，铁棒的长度增加了。
4·Half on the road, he met a gray-haired old lady sitting in a small river, exert herself grinding a thick iron bar.
半路上，他遇到一位白发苍苍的老婆婆，坐在小河边，用劲磨一根碗口粗细的铁棒。