歌曲信息

歌曲专辑：VOA慢速英语：健康报道

演唱歌手：英语听力

A Medical Device Can Find Malaria Infections歌词

[00:00.10]From VOA Learning English,
[00:01.69]this is the Health Report.
[00:04.18]Researchers have developed a medical device
[00:07.38]which they say can find malaria infections in the human body.
[00:13.12]The laser beam scanner is the first device
[00:17.05]that can find the sometimes deadly disease
[00:20.36]without going inside the body.
[00:23.34]The test is painless, does not need blood from a person,
[00:27.51]and appears to be right every time it is done.
[00:31.37]At the present time,
[00:33.14]a trained medical worker needs costly equipment,
[00:37.52]a person's blood and a lot of time to know
[00:41.57]if a person has been infected with malaria.
[00:44.76]Trained workers, equipment and time
[00:47.71]are not always available in poor parts of the world.
[00:52.11]The newly developed device only needs a person
[00:56.04]to place a finger on a laser device.
[00:59.60]Doctor Dmitri Lopotko is a researcher
[01:03.51]at the department of biochemistry and cell biology
[01:07.51]at Rice University in Houston, Texas.
[01:10.50]"We shine a very short light pulse through the skin.
[01:15.09]And this light pulse is absorbed only by malaria parasites
[01:21.42]because of the wavelength we use.
[01:25.16]And in response to this short light pulse,
[01:30.16]the parasite literally explodes," he said.
[01:33.48]The light pulse comes from a low-powered laser.
[01:37.80]It has less power than a laser point.
[01:41.17]It shines on a very tiny particle called the hemozoin
[01:46.43]
[01:49.61]once it has infected red blood cells.
[01:52.87]Hemozoin crystals are not found in red cells
[01:56.72]that are not infected with malaria.
[01:59.86]As the crystals are heated by the laser,
[02:03.15]they create small bubbles inside infected cells.
[02:07.25]Doctor Lopotko says the bubbles exploded,
[02:10.93]and then make a sound that scientists can hear and count.
[02:17.15]"You can detect just a few infected cells
[02:21.39]in a million normal cells," he said.
[02:24.92]Doctor Lopotko says when researchers tested the device,
[02:29.17]it was never wrong.
[02:30.96]And it was able to find malaria infection early
[02:35.20]when treatment is very important.
[02:37.13]The device can be carried and uses its batteries.
[02:41.64]It costs about 10,000 to 20,000 dollars to make.
[02:46.64]But Doctor Lopotko says
[02:48.91]considering the number of people it can test,
[02:51.67]that is not a lot of money.
[02:54.51]"Each device will be capable to screen more than 200,000 people per year.
[03:01.18]So the cost of analysis for each patient
[03:06.65]will be less than 50 cents," he said.
[03:08.83]People without medical training can use the device
[03:12.73]to discover whether people are infected with malaria.
[03:16.29]Doctor Lopotko says the light beam used by the device is safe.
[03:21.85]Researchers will now test the device at a hospital in Houston
[03:27.20]that cares for patients infected with malaria.
[03:30.69]If those tests are successful,
[03:33.31]researchers will test the device throughout the world this year.
[03:38.17]An article describing the malaria detection device
[03:42.48]was published in the journal
[03:44.40]Proceedings of the National Academy of Sciences.
[03:47.84]And that's the VOA Learning English Health Report.
[03:52.40]I'm Christopher Cruise.
上面是千思维歌单网提供歌曲A Medical Device Can Find Malaria Infections的歌词全文和下载地址，A Medical Device Can Find Malaria Infections原唱是谁，是谁唱的，是什么歌的等内容。

A Medical Device Can Find Malaria Infections评论

A Medical Device Can Find Malaria Infections免费下载地址

免费获取全部资源
永久免费
下载地址教程
地址/密码请 点击这里回复 后查看
――――――――新手教程――――――――
点击上面回复进入后→点击下方的微信免密一键登录→回复一下帖子然后刷新即可获取地址。

• 英语听力