单词:cell selection(darlington 1937)
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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
[00:00.00]Unit 18 Annoying things [00:06.79]2 While you read A sticky problem [00:15.73]You can imagine the scene. [00:20.58]Youre walking down the street of an old English town. [00:25.65]You decide to sit on a bench to admire the fine buildings and
[ti:] [ar:] [al:] [by:] [00:01.00] Late At Night, Do You Turn Off Your Cell Phone? 今夜不关机 [00:08.22]Today, my friend asked me a question. [00:11.17]At night, do you turn off your cell phone? [00:14.78]If you dont, whom do you leave it on for
AA: I'm Avi Arditti with Rosanne Skirble, and this week on WORDMASTER: remembering a comedian who took a serious interest in language. George Carlin died of heart failure at a hospital in Santa Monica, California, on June twenty-second. RS: The stand
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
Books and Arts; Book Review; 文艺;书评; Otters in the wild 野生水獭 Beguiling carnivores 欺骗性的肉食动物 A muse to poets, a mystery to scientists 诗人的灵感,科学家的谜团 Poets dig my style 诗人尽挖我的风采 Ot
The girl would turn her cell phone off and put it by her photo on the desk everynight befor going to bed. This habit had been with her ever since she bought the phone. The girl had a very close boyfriend,when they couldn't meet ,They would either cal
00:06.79]2 While you read A sticky problem [00:15.73]You can imagine the scene. [00:20.58]Youre walking down the street of an old English town. [00:25.65]You decide to sit on a bench to admire the fine buildings and beautiful flowers [00:32.31]a litt
By Carol Pearson Washington 25 September 2007 A lot of people wonder about the impact cell phones might have on their health. And now a new study shows that heavy mobile, or cell, phone use may result in hearing loss. VOA's Carol Pearson reports. As
VOICE ONE: I'm Barbara Klein. VOICE TWO: And I'm Steve Ember with People in America in VOA Special English. Today we continue our report about the life and music of one of America's greatest composers, George Gershwin. (MUSIC: Rhapsody in Blue) VOIC
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
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
10 Things You Didnt Know About Cell Phones Just when we feel comfortable enough to say wow, cell phones have really changed the way we operate, things get even weirder. Here are 10 facts about cells from around the world that show the scale and style
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
AA: I'm Avi Arditti with Rosanne Skirble, and this week on WORDMASTER: remembering a comedian who took a serious interest in language. George Carlin died of heart failure at a hospital in Santa Monica, California, on June twenty-second. RS: The stand
By Jessica Berman Washington 19 December 2007 Stem cell research was the major medical and science story this past year, topping the list of achievements that experts say might finally lead to cures for many diseases. Meanwhile, global health officia
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
Why You Shouldn't Leave Nude Photos of Yourself on Your Cell Phone The 23-year-old woman lost her cell phone in a restaurant parking lot. By the next morning, someone was texting nude photos of her to everyone. As regular readers have learned many ti