神奇校车 45 - Goes Cell-Ular

神奇校车带领孩子们进入浩瀚的科学领域，游梭于生物科学、地球科学、太空科学、气象学、古生物学等各门学科中。被纽约时报评为最新鲜有趣、最富有创意和想象力的科学启蒙方式。孩子

太阳科普 第8期

Now the speed of light is a very,very big number. 光速是个很大的数字 So if we just take a small amount of mass, 所以只要一点点质量 you get a huge amount of energy. 就含有大量能量 And that's the energy which actually powers ou

VOA常速英语2008年-Questions Raised About Credibility of Lung Canc

By Melinda Smith Washington 31 March 2008 A recent story in The New York Times newspaperraised serious questions about the credibility of a lung cancer study paid for in part by a large tobacco company. As VOA's Melinda Smith reports,there is growing

美国国家公共电台 NPR Kentucky Lawmakers Limit Black Lung Claims Reviews Despite Epidemic

KORVA COLEMAN, HOST: We've been covering a surge in black lung cases across Appalachia. That's the disease that destroys the lungs of coal miners like Mackie Branham. MACKIE BRANHAM: I'm in bad shape, man. I mean, I can no longer provide for my famil

ENVIRONMENT REPORT - Air Pollution/Lung Cancer

By Cynthia Kirk ENVIRONMENT REPORT -March 22, 2002: Air Pollution/Lung Cancer This is the VOA Special English ENVIRONMENT REPORT. Researchers have completed a major study on the health effects of air

VOA标准英语2011--Study: Early CT Scans Increase Lung Canc

Study: Early CT Scans Increase Lung Cancer Survival Rates A new study has found smokers and former smokers who develop lung cancer are more likely to survive if their disease is detected with a computed tomography, or CT scan instead of a standard ch

美国国家公共电台 NPR Older Patients Can Benefit From Lung Cancer Surgery

Older Patients Can Benefit From Lung Cancer Surgery play pause stop mute unmute max volume 00:0000:00repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin. DAVI

英闻天下——67 Chavez Suffers "Severe" Lung Infection

Venezuelan authorities are now conceding President Hugo Chavez is dealing with a severe lung infection. Ernesto Villegas is the Information Minister. After the delicate surgery of this past December 11, Comandante Chavez has faced complications as a

2007年VOA标准英语-Doctors May Predict Chances of Surviving Lung C

By Carol Pearson Washington, DC 05 January 2007 watch Lung Cancer Gene report Lung cancer is the deadliest cancer in the world. It claims the lives of almost three million people a year. This cancer is hard to cure, but clues about the most effectiv

HEALTH REPORT - Lung Cancer: Tobacco Is Usually the Cause, b

HEALTH REPORT - Lung Cancer: Tobacco Is Usually the Cause, but Not Always By Cynthia Kirk Broadcast: Wednesday, August 17, 2005 I'm Shep O'Neal with the VOA Special English Health Report. Last week, a

HEALTH REPORT - Studies Shows Chemotherapy Improves Lung Can

HEALTH REPORT - Studies Shows Chemotherapy Improves Lung Cancer Survival By Cynthia Kirk Broadcast: Wednesday, July 13, 2005 I'm Faith Lapidus with the VOA Special English Health Report. An x-ray imag

VOA常速英语2008年-Scientists Identify Lung Cancer Genes

By Jessica Berman Washington 03 April 2008 Three independent teams of researchers have found genes that may explain why some smokers get cancer and others do not, and why some people who never smoke also get the disease. Investigators say the discove

2006年VOA标准英语-Lung Cancer is the Most Common Cause of De

By Carol Pearson and Rosanne Skirble Washington, DC 09 March 2006 watch Lung Cancer report Dana and Christopher Reeve Dana Reeve was best known as the widow of actor Christopher Reeve, and as a tirele

U.S. lung cancer rates decline: CDC

WASHINGTON, Sept. 15 (Xinhua) -- The rates of new lung cancer cases in the United States dropped among men in 35 states and among women in six states between 1999 and 2008, according to a report released Thursday by the Centers for Disease Control an

Lung patients get singing therapy

Lung patients get singing therapy 肺病患者歌唱疗法 Doctors in London are investigating how singing can help seriously ill patients improve their breathing control. Regular classes are being held at the Royal Brompton Hospital. Hundreds of patients h

China faces severe plasma shortage: health minister

BEIJING, Dec. 11 (Xinhua) -- China is faced with severe challenges in collecting enough blood plasma to produce medicines, Health Minister Chen Zhu said Sunday. Chen called on the public to join blood donation after donating blood plasma at the Beiji

发送电子邮件也会产生碳足迹么？

You might not realise it, but sending even a short email has an impact on the environment. 你可能没有意识到，即使是发送一封小小的邮件也会对环境产生影响。 Scientists estimate that an email adds about four grams (0.14 oun

Lesson 44-1 Home Appliances 家用电器

Listen to the statements and check the correct answers. 1.Is sweeping out the tiny dust bothering you a lot? From now on if you have this machine, doing the housework will become a very easy job. This is a portable vacuum cleaner. lt's light and wire

U.S. researchers discover human lung stem cell

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

Chinese health minister donates plasma

CHENGDU, May 5 (Xinhua) -- Chinese Health Minister Chen Zhu donated plasma on Saturday in Chengdu, capital of southwest China's Sichuan Province, and called on health workers to take the lead in blood donation to ease the country's blood supply short