2017年英语六级听力VOA听写练习
书籍是全世界的营养品,生活里没有书籍,就好像大地没有阳光;智慧里没有书籍,就好像鸟儿没有翅膀。以下是小编为大家搜索整理的`2017年英语六级听力VOA听写练习,希望对正在关注的您有所帮助!更多精彩内容请及时关注我们应届毕业生考试网!
task 1Most people suffering from multiple sclerosis or spinal cord injuries can still move their eyes because they are directly connected to the brain. Some existing technologies already allow severely disabled people to stare at arrows on a computer and direct the movement of a wheelchair.
But there are problems with that system, including a delay between the movement of the eyes and the wheelchair.
"Current tracking software often uses a screen-based system where you have a screen open and you look at locations on the screen. The problem with that is that it's very simplistic and also diverts the users' attention from the outside world and therefore there's more risk of not noticing obstacles or other things in the way," said Kirubin Pillay, a PhD student at Imperial College London.
A team led by Aldo Faisal at Imperial College London has developed software that allows users to maneuver the chair just by looking in the direction they want to take.
"Our eyes are not only a window into our soul, they're also a window to our intentions. So if you want to go somewhere, for example if I want to go there, or go there, I will look there and I will look there in a specific manner, and we can build a computer system that can decode our eye movements, and so we observe eye movements with an eye tracker, and we then try to make sense of them, and the computer interprets these commands and drives the wheelchair accordingly,” said Fasial.
Two cameras trained on the eyes observe their movements and can determine whether a patient is merely looking around or wants to move in a certain direction.
"So essentially we track the pupil of the eye and via a calibration process, we relate that to where the subject's looking in the world around them," explained William Abbott, a researcher at Imperial College London.
Visual information detected by cameras is analyzed by algorithms within 10 milliseconds and translated into instructions for movement that's almost instantaneous.
The camera-based system costs only about $85 because most of the work is done by the algorithms. No expensive hardware is needed. The London team hopes to make the system commercially available within three years.
task 2Michelle Howard received her fourth star at a ceremony at Arlington National Cemetery with her family and fellow servicemen looking on.
"If you don't believe today was the first - when I called to order, a four-star shoulder board for women - they didn't exist. [A] special contract was let and you folks are seeing the first set in the history of the United States Navy," said Howard.
Secretary of the Navy Ray Mabus was the promoting officer.
"The Navy picked the best officer to be the VCNO. That's the only thing that happened here today," said Mabus.
Since 1982, when she graduated from the U.S. Naval Academy, Howard has achieved many historic "firsts" in her career. She was the first African-American woman to achieve three-star rank in the U.S. Armed Forces, as well as being the first woman to achieve the rank of admiral in the Navy. She also was the first African-American woman to command a naval ship.
Chief of Naval Operations Jonathan Greenert said the honors mean extra obligations.
“She will bear the burden of a role model, and she is ready to bear that very well, and I am very excited about that because we need lots more women in the Navy,” said Greenert.
Howard was in the Pentagon during the September 11, 2001 terrorist attack, and in 2009 participated in the naval task force dispatched to rescue the U.S.-flagged merchant vessel Maersk Alabama and its captain Richard Phillips, who had been kidnapped by Somali pirates.
"I was just three days in the job when we got word that Captain Philips had been kidnapped," recalled Howard.
American women serving in the military have broken many barriers in recent years, and can compete for positions that were once were closed to them. Howard said her promotion can serve as further encouragement.
"My rank today lets them know that they can go from junior enlisted to MCPON (master chief petty officer) in the Navy or from ensign to admiral," said Howard.
Howard is the third woman in the U.S. military to reach a four-star rank. One is in the Army and the other in the Air Force.
“We, as a Navy and as a nation, have just got to quit wasting the talent and the ability based on race or gender or anything else," said Mabus.
Officials from all military service branches have announced plans to open combat positions to women who meet physical or performance standards by 2016.
-
2017大学英语六级翻译预测《中国水运》
大学英语六级的翻译往往是考生容易丢分的题目,下面,小编为大家送上2017大学英语六级翻译预测及翻译,供大家参考。请将下面这段话翻译成英文:中国水运历史悠久。早在商朝就有了帆船。隋朝大运河(TheGrandCanal)为南北水运带来了很大便利。明朝时期,郑和七次下西洋,在...
-
2016年12月大学英语六级阅读练习题精选
英语六级阅读做题时间的限制,那么快速阅读就没有必要一个单词一个单词去通读全文,而是需要详略有别的去扫读。以下是yjbys网小编整理的关于英语六级阅读练习题,供同学们练习。Cultureisthetotalsumofallthetraditions,customs,beliefs,andwaysoflifeofagivengroup...
-
英语六级考试必备词汇
词汇,又称语汇,是一种语言里所有的(或特定范围的)词和固定短语的总和。例如汉语词汇、英语词汇或一般词汇、基本词汇、文言词汇、方言词汇等下面是小编收集整理的英语六级考试词汇,希望能够帮助到大家。英语六级考试词汇1lookthrough详尽核查;(从头至尾)浏览lookup...
-
大学英语六级作文预测题就业选择(通用7篇)
在生活、工作和学习中,大家都写过作文吧,写作文可以锻炼我们的'独处习惯,让自己的心静下来,思考自己未来的方向。你写作文时总是无从下笔?以下是小编为大家整理的大学英语六级作文预测题就业选择,希望对大家有所帮助。大学英语六级作文预测题就业选择篇1Nowadays,wi...