标签：Radiation 相关文章
45.The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Suns very center. It is here that is to be found the source of the energy that the Sun constantly pours out i
新概念优美背诵短文50篇
诸多线索综合起来为我们描绘出一幅画面：那是火星遥远的过去，那时的火星还有着一层厚厚的大气层，令这颗星球温热暖和，从而使水能够在火星表面流淌。但如今，地表的水消失不见，而
60秒科学
Scientists are putting a modern spin on a cancer treatment that goes back to antiquity. It's heat therapy, which is getting a new look with the help of microscopic particles of gold. Cancer treatments usually involve powerful drugs or radiation. But
VOA标准英语2010年(十)月
Black holes got their name because light can't escape them, beyond a certain radiusthe event horizon. But in 1974 Stephen Hawking proposed that quantum effects at the event horizon might cause black holes to benot completely black. Hawking said that
2016年Scientific American(八)月
We learn today that the nuclear crisis is even worse than we thought. Officials have raised the scale of the incident to the highest level, the same as Chernobyl. People within the 12-mile radius of the plant are already under strict evacuation order
万花筒2011年
By Anya Ardayeva Moscow 25 April 2006 watch Chernobyl Site report Twenty years ago on April 26, 1986, a massive blast at the Chernobyl Nuclear Plant sent a cloud of radioactivity across Europe, affect
2006年VOA标准英语（四月）
By Tom Rivers London 24 November 2006 Calling it unprecedented, a British official says former Russian Spy Alexander Litvinenko was poisoned by radiation. For VOA News, Tom Rivers reports from London. Alexander Litvinenko, former KGB spy and author
2006年VOA标准英语（十一月)
By Anya Ardayeva Moscow 24 April 2006 watch Chernobyl Anniversary On April 26, 1986, a massive explosion tore through Reactor Number Four at the Chernobyl Nuclear Power Plant. It was the most devastat
2006年VOA标准英语（四月）
The first stars in our Milky Way were fearsome high-octane stars, burning their hydrogen fuel at tremendous rates, rushing through their life cycle. They like the rockslides. They live fast and die young. They run out of their fuel very quickly and e
自然百科2011年
By Deborah Block Washington, DC 05 December 2006 watch Nobel Prize Science Winners On Sunday, (December 10, 2006) this year's Nobel Prizes are being presented in Stockholm, Sweden. The annual awards are given to people who have made outstanding cont
2006年VOA标准英语（十二月）
The International Atomic Energy Agency is making a push for an unusual type of technology, using radiation to produce higher yielding and hardier plants. Lisa Bryant has more on the technology that the IAEA says could help reduce hunger affecting mi
VOA标准英语2008年(十二月)
By Steve Herman Tokyo 07 December 2006 Top-level international health officials say recent outbreaks of bird flu in South Korea emphasize the need for greater preparedness to deal with a potential human influenza pandemic. As Steve Herman reports fr
2006年VOA标准英语（十二月）
By Melinda Smith Washington 01 October 2009 Child with cancer A childhood cancer foundation based in the U.S. estimates that 160,000 children around the world are diagnosed each year with cancer. The odds of survival are better in developed countrie
VOA标准英语2009年(十月)
Cosmic Radiation 上世纪早期，科学家发现一种神秘的辐射形式会破坏他们的实验。后来奥地利物理学家Victor Hess研究发现辐射可能来自天空。后来他多次坐热气球用各种仪器（包括测量放射电荷的
英语听力文摘 English Digest
Proton Therapy 质子疗法也叫质子刀，是放射治疗的一种，比普通的放射疗法更有针对性。质子作为带正电荷的粒子，以极高的速度进入人体，由于其速度快，在体内与正常组织或细胞发生作用的
英语听力文摘 English Digest