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[report整理] SENEWS-2016-05-23

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[report整理] SENEWS-2016-05-23

本帖最后由 qingchengshan 于 2016-5-24 17:01 编辑

SENEWS-20160523 Report


Technology   Report


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We all have daily problems with technology, but how many of us can fix them?

 

Mya Le Thai is a scientist studying at the University of California, Irvine. She recently discovered a process that may result in batteries that last forever. VOA Learning English spoke with Thai about her discovery.

 

Thai said she had been frustrated that the batteries for her wireless devices degrade. Over time, they fail to charge fully.

 

Thai did not like to have keep her wireless laptop connected to an electrical outlet.

 

She decided to do something about that problem.

 

At first, she and her team at UC Irvine thought about inventing a new battery. But as they experimented, Thai discovered something that might permit lithium-ion batteries to last forever.

 

Lithium-ion batteries power most wireless devices. Over time, the batteries lose the ability to hold a charge. Most of these batteries have a life span of about 7,000 charging cycles before they die.

 

One of the reasons lithium-ion batteries degrade is their use of nanowires to carry electricity. Nanowires are extremely thin. A human hair is thousands of times thicker, for example.

 

Nanowires are extremely efficient carriers of electricity, which makes them useful in batteries. But Thai said their thinness also makes them weak.

 

"Nanowires break and fracture over time," she said. "That's why they lose capacity."

 

But, Thai had a theory: The nanowires might last longer if covered with a gel. She and the team tested her theory.

 

"It was a long process and a lot of work," Thai said.

 

The team tried many coverings for the wires. PMMA was one of them.

 

The nanowires were coated with PMMA and cycled through charges 200,000 times. The PMMA coated nanowires showed no evidence of damage.

 

The results suggest that batteries could last forever, without losing charging ability. Thai said 200,000 cycles amount to about three months on just one device.

 

Thai hopes to continue her research to understand why this gel works so well and to see if any other gel could create better results.

 

Mya Le Thai told VOA she is enjoying the publicity about her discovery. She said she never expected her research to get media coverage.

 

"It's kind of cool," she said. "I'm really glad people are showing interest in my work and not just in the work itself, but also in technology and energy."

 

I’m Caty Weaver.

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The World Bank says a total of almost 62 million girls around the world are not in school. A World Bank study found that a woman’s lifetime earnings increased by 18 percent for every year she attended school.

 

The bank said its investments will support efforts to provide a quality education in secondary school and financial assistance to adolescent girls. The money will help to finance clean drinking water and toilets in schools.

 

I’m Marsha James.

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Homework

From VOA Learning English, this is the technology report, M.T. is a scientist at the University of California Erye, he recently discovered a process that could result batteries lasting forever. T spoke with VOA Learning English about her discovery, she said she was not happy with the lebring batteries in her wireless devices, she said that over time they lose their ability to lose their charge, she said this is because the batteries use nanel wires, the small wires that extremely thin, a human hair is a thousand time thicker than a nanel wire for example, as a result, nanel wires make easily, but they are also effect carriers of electricity. T had beaury, nanel wire may last longer covered, she and her team and E experimented many coverings, they found success with pma, a hard clear plastic material, the nanel wire covered with pma sycaled though charges 28 times more than uncovered nanel wires, the pmma covered wires show no evidence of damage after 200,000 cycles, the results suggests that batteries with covered nanel wires might last forever. For VOA Learning English, this is the last Technology Report for Learning English TV, but we are not going away, we will continue to bring you videos to help you learn American English, go to Learningenglish.voanews.com to find new materials and to look for past Learning English TV reports. I’m C thank you for watching and learning with VOA Learning English.
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homework
From VOA Learning English, this is the technology report, M.Thai. is a scientist at the University of California irvive, she recently discovered a process that could result in batteries lasting forever. Thai spoke with VOA Learning English about her discovery, she said she was not happy with the lithiumiron batteries in her wireless devices, she said that over time they lose their ability to fully-charge, she said this is because the batteries use nanowires, the small wires that extremely thin, a human hair is a thousand time thicker than a nanowire for example, as a result, nanowires break easily, but they are also effective carriers of electricity. Thai had a theory, nanowire may last longer covered, she and her team and E experimented many coverings, they found success with PMMA, a hard clear plastic material, the nanowire covered withPMMA circles though charges 28 times more than uncovered nanowires, the pmma covered wires show no evidence of damage after 200,000 cycles, the results suggests that batteries with covered nanowires might last forever. For VOA Learning English, this is the last Technology Report for Learning English TV, but we are not going away, we will continue to bring you videos to help you learn American English, go to Learningenglish.voanews.com to find new materials and to look for past Learning English TV reports. I’m C thank you for watching and learning with VOA Learning English.
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实现无障碍英语沟通

Homework

本帖最后由 凉春薄月 于 2016-5-23 04:31 编辑

From VOA Learning English, this is the technology report, M.T is a scientist at the University of California *, she recently discovered a process that could result in batteries lasting forever. M.T spoke with VOA Learning English about her discovery, she said she was not happy with the lithium batteries in her wireless devices, she said that over time they lose their ability to fully charge, she said this is because the batteries use nanowires, the small wires are extremely thin, a human hair is a thousand times thicker than a nanowire .For example, as a result,  nanowires break easily, but they are also effective carriers of electricity. M.T had a theory, nanowires may last longer if covered, she and her team and * experimented with many coverings, they found success with pmma, a hard clear plastic material, the nanowires covered with pmma cycled through charges 28 times more than uncovered nanowires, the pmma covered wires show no evidence of damage after 200,000 cycles, the results suggests that batteries with covered nanowires might last forever. For VOA Learning English, this is the last technology report for Learning English TV, but we are not going away, we will continue to bring you videos to help you learn American English, go to Learning english.voa news.com to find new materials unlocked for past Learning English TV reports.
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[Homework]SENEWS-2016-05-23

From VOA learning english, this is the technology report.Neiol Li Tai is the scientist at university of california Eervan. she recently discovered a process that could resort the batteries lasting forever. Tai spoke with VOA learning english about her discovery.she said she was not happy with the limit and enpty battery in her voillst divices. she said that over time they lose their ability to fully change.she said this is because the batteries use nano wires.The small wires are extremlly thing.A human hair is the thousand times thinker than the nano wires for example.As the result, nano wires break easily.But, they are also effective carries of elictricity.Tai had firely,nano wires might last longer if covered.She and her team at earvan expirimented with many coverys, they fround success with PMMA a hard clear classic material.The nano wires covered with PMMA cycled thought changes 28 times more than uncovered nano wires.The PMMA covered nano wires show no anvedence of demage after 200,000 cycle.The resouce sugust batteries with covered nano wires my last forever.For VOA learning english this is the last technology report for learning english TV.But we are not going away, we will continue to bring new vidios to help you learn Amarican english.Go to learning english.VOAnews.com to find news material and to look for past learning english TV reports.I'm Karilly for suty, thank you for watching and learning with VOA learning english.

This post was generated by put listening repetition system,  Check the original dictation thread!
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From VOA learning english, this is the technology report.Neiol Li Tai is the scientist at university of california Eervan. she recently discovered a process that could resort the batteries lasting forever. Tai spoke with VOA learning english about her discovery.she said she was not happy with the limit and enpty battery in her voillst divices. she said that over time they lose their ability to fully change.she said this is because the batteries use nano wires.The small wires are extremlly thing.A human hair is the thousand times thinker than the nano wires for example.As the result, nano wires break easily.But, they are also effective carries of elictricity.Tai had firely,nano wires might last longer if covered.She and her team at earvan expirimented with many coverys, they fround success with PMMA a hard clear classic material.The nano wires covered with PMMA cycled thought changes 28 times more than uncovered nano wires.The PMMA covered nano wires show no anvedence of demage after 200,000 cycle.The resouce sugust batteries with covered nano wires my last forever.For VOA learning english this is the last technology report for learning english TV.But we are not going away, we will continue to bring new vidios to help you learn Amarican english.Go to learning english.VOAnews.com to find news material and to look for past learning english TV reports.I'm Karilly for suty, thank you for watching and learning with VOA learning english.
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【homework]
From VOA Learning English, this is the technology report, M.T is a scientist at the University of California ---, she recently discovered a process that could result in batteries lasting forever. M.T spoke with VOA Learning English about her discovery, she said she was not happy with the --- batteries in her wireless devices, she said that over time they lose their ability to fully charge, she said this is because the batteries use --wires, the small wires are extremely thin, a human hair is a thousand times thicker than a --wire .For example, as a result,  --wires break easily, but they are also effective carriers of electricity. M.T had a theory, --wires may last longer if covered, she and her team and -- experimented with many coverings, they found success with --, a hard clear plastic material, the --wires covered with -- cycled through charges 28 times more than uncovered --wires, the -- covered wires show no evidence of damage after 200,000 cycles, the results suggests that batteries with covered --wires might last forever. For VOA Learning English, this is the last technology report for Learning English TV, but we are not going away, we will continue to bring you videos to help you learn American English, go to Learning English.VOA news.com to find new materials unlocked for past Learning English TV reports.
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实现无障碍英语沟通
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From VOA learning English, this is the technology report.
May la Thai is a scientist at the University of California Irvine. she recently discovered a process that could resort in batteries lasting forever. Thai spoke with VOA learning English about her discovery. She said she was not happy with the Lithium-Al batteries in her wireless devices, she said that overtime they lose their ability to fully charge. She said this is because the batteries use nanowires, the small wires are extremely thin, a human hair is a 1.000 times thicker than a nanowire for example. As a result, nanowires break easily, but they are also effective carriers of electricity. Thai had a theory, nanowires might last longer if covered, she and her team at Irvine experimented with many covings, they found success with PMMA, a hard clear plastic material, the nanowires covered with PMMA cycled through chargers 28 times more than uncovered nanowires., the PMMA covered wires show no evidence of damage after 200,000 cycles, the result suggested that batteries with covered nanowires might last forever.
For VOA learning English, this is the last technology report from learning English TV, but we are not going away, we will continue to bring new videos to help you learn American English. Go to learning English.VOAnews.com to find new materials and to look for past learning English TV reports.  
I’m ??, thank you for watching and learning with VOA Learning English.
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