单词:asbestos diaphragm electrolytic cell
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By Caty Weaver Broadcast: July 25, 2003 This is Bill White with the VOA Special English Environment Report. Researchers say they have found a way to reduce the cost of some 1)fuel cell production. The
Voice 1 Welcome to Spotlight. Im Liz Waid. Voice 2 And Im Ryan Geertsma. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 The year was 1922. Charles Osborn
This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Asbestos increases the risk for certain cancers. The fibers are thought to do so by skewering cells, setting off chemical reactions that lead to inflammation,
文本: Batman:I'm listening. Joker:Is someone feeling a little _(1)_? Batman:What do you want? Joker:Oh,Bats,cheer up.It won't kill you.Oops. Batman:Where is the cure? Who has it? Joker:I had our cold-hearted friend Mister Freeze making it.But he'
At the city of Baku on the side of the Caspian Sea there are so many oil-wells and so much oil that it seems to get into everything. 在里海边的巴库城有很多很多油田,出产大量的石油,似乎什么东西都沾上了石油。 You s
For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea
In the 17th century, the French scientist Pierre Gassendi knew that light traveled faster than sound. When a gun fired far away, he could see the flash of gunshot long before he heard the report. Gassendi tried to measure the speed of sound by clocki
VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Barbara Klein. Today, we will tell about a plan to fight a leading killer of children in developing countries. We will tell about a new way to recogni
By Bill Rodgers Washington 19 May 2008 Cell phones are an example of what is sometimes now called leapfrog technology, a product that allows developing nations the benefits of a reliable and extensive communications network without the heavy investme
California has an official animal, the grizzly bear, and a state bird, the California quail. It has an official grass, purple needle grass, and a state reptile, the desert tortoise. It even has an official song, a century-old tune called I Love You,
Let's have a look at what's leading on our News today: And more than 100,000 people are expected to pack Flemington Racecourse for today's running of the Melbourne Cup. This year's cup is likely to be dominated by international runners with 11 overse
Weve all experienced them at one time or another, often right after a big meal. A normal bout of hiccups usually lasts only a few minutes and may contain up to seventy individual hics. Unlike coughing or sneezing which can help clear your airways, hi
Idiom: Practice what you preach 言行一致 Hit the book: Audience Circumstance Proceed Resist Channel Suppress 1. If you want to talk (or sing, act, etc.), you have to breathe. And if you want to do these things calmly, you'll need to breathe diaph
Each day, millions of tonnes of rubble go by truck to Bottle Lake Forest in Christchurch. Demolition companies are working seven days a week to demolish buildings in the CBD after the earthquakes caused so much damage. Cranes, bulldozers, excavators,
By Victoria Cavaliere New York 16 October 2007 An annual stem cell research conference in New York has been bringing together some of the field's top scientists to discuss breakthroughs in stem cell research and what proponents call its long-term app
By Paul Sisco Washington 17 April 2008 Federal regulators in Washington have approved plans to upgrade the nation's Emergency Alert System to include text messages to cellphones and other mobile devices. VOA's Paul Sisco has more in this Searching fo
WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo
Turn Off Your Cell Phone 关掉你的手机 We went to the movie the other night. I sat in an aisle seat as I usually do, because it feels a little roomier. Just as the feature was about to start, a blonde from the center of the row got up and starte
NBN Chief Mike Quigley is calling for calm over an asbestos scare of some of its roll-out sites. Several sites in New South Wales, Victoria and WA have been shut down. Telstra is hiring an extra 200 safety specialists to inspect all asbestos-related
WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified(鉴定) a human lung stem cell that is self-renewing and capable of forming and integrating multiple bi