主持人命题:阅读下面的材料,根据要求写一篇不少于800字的文章。英格兰少年汉弗莱·波特,受雇看管蒸汽发动机:每当操纵杆敲下来,就把废蒸汽放出去。他是个懒人,觉得这活儿太累人,就在机器上装了几根铁丝和几个螺栓,这样,阀门就可以靠这些东西自动开关了。 Moderator Proposition: Read the following materials, according to the requirements of writing an article no less than 800 words. Humphreys England Humphrey Potter, employed to watch the steam engine: Whenever the lever knocks, it releases the waste steam. He was a lazy man, thinking it was too tiring to have a few wires and a few bolts on the machine, so that the valve could be switched on and off by these things.