英文作文、、急、、急、、

翻译英语短文~

机器人很聪明，他们可以用电脑头脑帮助人们在危险的地方做一些工作或是困难的工作。一些机器人做常规工作。罗比，一个邮件运送者，把邮件送往华盛顿D。C。的一栋办公大楼里。他是美国的250个邮件运送者之一。
有200磅重6英尺高的里奇姆先生（机器人），作为一名老师有他的优势。其中一个是他不会忘了细节。他知道每个孩子的名字、父母的名字和每个孩子知道什么、需要知道什么。并且他知道每个孩子的宠物和他们的业余还好。里奇姆先生从不犯错。每个孩子去并说出他或她的名字并且拨下一个确认身份的号码。他的电脑大脑就把孩子们的声音和号码一起记下。他能准确无误地辨认孩子们。然后他开始上课。
里奇姆先生（机器人）的另一个好处是可以变通的。如果孩子们需要更多的时间完成他们的功课，他们可以转动开关。他们可以用这种方法一遍一遍地重复里奇姆先生的课程。他给孩子们讲一些关于他们业余爱好的有趣的事，当他们表现好的时候。课堂结束后，孩子们关掉了里奇姆先生。

godsElectric Backpack Backpacks are convenient. They can hold your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don’t mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, and maybe even light your way home. Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass. , have inverted a backpack that makes electricity from energy produced while its wearer walks. In military actions, search-and-rescue operations, and scientific field studies, people rely increasingly on cell phones, global positioning system (GPS) receivers, night-vision goggles, and other battery-powered devices to get around and do their work. The backpack’s electricity-generating feature could dramatically reduce the amount of a wearer’s load now devoted to spare batteries, report Rome and his colleagues in the Sept. 9 Science. The backpack’s electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearer’s back, and the whole pack moves up and down as the person walks. A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts. Unexpectedly, tests showed that wearers of the new backpack alter their gaits in response to the pack’s oscillations, so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage, Rome plans to commercialize both electric and non-electric versions of the backpack. The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs aren’t on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!; .就是

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