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2017年大學英語六級聽力訓練材料

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2017年大學英語六級聽力訓練材料
  task 1

With an estimated 11-12 million foreign nationals living illegally in the United States, and a crush of underage would-be immigrants arriving daily, Republican lawmakers like Senator Jeff Sessions are pinning the blame on the Obama administration.

“The sad reality of lax enforcement, plus the lack of a clear message is what is driving the surge. The reality is, if you get into the country today, you are not being deported. That is true!” – said Sessions.

But America’s immigration challenges cannot be solved through law enforcement alone, according to Democratic Senator Harry Reid.

“Eleven million people. We cannot fiscally [afford to] deport 11 million people. We cannot physically do it. It will not work,” said Reid.

A comprehensive immigration reform bill that would provide an arduous path to citizenship for the undocumented and boost border enforcement passed the Senate last year, but stalled in the Republican-controlled House of Representatives. Now, President Obama is asking Congress for additional funds to speed the processing and deportation of new arrivals from mostly-Central American nations.

U.S. Customs and Border Protection Commissioner Gil Kerlikowske notes U.S. law treats non-Mexican arrivals as refugees, not illegal immigrants.

“These are not gang members. These are not dangerous individuals,” said Kerlikowske, speaking on ABC’s This Week program.

At the same time, high-ranking U.S. officials have gone to Central America with a simple message: do not send children to the United States. That message is too little too late, according to Republican Senator John Cornyn.

“Unless we send a clear message that our border is being enforced and our laws are being upheld, we will continue to face crisis after crisis after crisis. Meanwhile, untold numbers of migrants will continue suffering and dying in Central America and Mexico, just trying to get here. Or get here, showing up on our doorstep, and overwhelming our capacity to deal with them in a responsible way,” said Cornyn.

Hopes Congress would enact a long-term fix to America’s immigration woes died when House Speaker John Boehner ruled out a vote for the remainder of the year. Last week, President Obama pledged to do what he can on his own through executive authority.

  task 2

Most 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.