老师让写一篇英语的说明文

My name is water, composed of two hydrogen atoms and one oxygen atom, which is an indispensable friend. Miscellaneous Earth every place I have the footprints. I could offer benefits to people, but also bring disaster. If you can grasp my temper, I returned very good to you good service, live together in harmony. For example, I can gather rivers of human generation, but also for farmers to irrigate farmland can also carrying ships. World ship and swap items. If people a long time I did not see that they would do everything possible to look for me, because they really need me. I like workers and newborns, I often workers to wash away the day's dirt; ice cold water to drop dead newborn shed his longevity. If you fail to master me. "Hey! No, that is nothing but a bad temper and the" For example, I would like to go on destroying the dam flooded the entire city. caused tremendous suffering to mankind. I also stemmed into hail, each housing 100700; Into a downpour, inundated