单词：ethyl radicals
单词：ethyl radicals 相关文章
AS IT IS 2014-05-25 Scientists Search for New Ways to Stop Mosquitoes 科学家们寻找新的方法来对付蚊子 The sound of a mosquito can mean trouble in many parts of the world. The bite of a mosquito can be deadly. Today, we will hear about s
2014年VOA慢速英语(五)月
美科学家研发新一代驱蚊剂 In many regions of the world, mosquitoes are a seasonal pest. In other regions, they carry serious diseases like malaria. The World Health Organization estimates that almost 630,000 people died of malaria-related
VOA双语新闻 2014年1月
Ice-cream and banking By John Kuti Russian ice-cream is great. Any shop or street seller can offer a choice of different ones for less than ten roubles, thats about 20p in British money, which I think is a fair price. They have natural fruit flavours
英语音频杂志
The jury is still out on whether vitamin C can treat or prevent a cold, but a recent review of the scientific literature suggests that it does have some benefits. 虽然维生素C能否治疗或预防感冒依然没有定论，但是最近的一项科学
实用英语
Youve no doubt heard of free radicals, those nasty chemicals that seem to contribute to heart disease, cancer and all sorts of human ailments. Maybe you even take antioxidant vitamins to help get rid of these unwanted toxins. Well, maybe you shouldnt
Scientific American(十)月
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. If you get a scratch, your skin can heal itself. But if your car gets scratched, it stays scratched. Scientists at the University of Southern Mississip
Scientific American(三)月
This is Scientific American's 60-second Science. I'm Karen Hopkin. This will just take a minute. Exercise is good for you. Antioxidants are good for you, but put them together, and its not as good as you think because a recent study shows that some v
Scientific American(五)月
'Terrorists in Love' Examines Islamic Radicals How does a young man transform from a law-abiding middle-class citizen into a terrorist? Ken Ballen, a former federal prosecutor, spent five years trying to find answers to that question. The result is a
VOA标准英语2011年(十一月)
Promising Mosquito Repellent Announced美科学家研发新一代驱蚊剂 In many regions of the world, mosquitoes are a seasonal pest. In other regions, they carry serious diseases like malaria. The World Health Organization estimates that almost 6
VOA标准英语2014年(一月)
Islamist Radicals React Online to Boston Attacks The bombings at the Boston Marathon not only caught U.S. intelligence services by surprise; on Jihadist websites, debate has raged over the motivations and implications, according to Shiraz Maher of th
VOA标准英语2013年(五月)
One Police stops on police vehicle outside one Victoria's Bar. After the preparation, as necessary arrests?, this liquor drive slightly mixes. Suddenly he sees to have a young people shakely goes out from bar, spend the many figures only then finds
白领英语晨读
很精彩的英文报刊短句欣赏 2 05-23 19. The setting up of a credible oversight authority has curbed police brutality. 由于建立了一个可信任的监督机构，警察暴行受到了遏制。 注：oversight,监督，监管。 20. The n
实用英语
At this rate, scientists will have to come up with a better description for the tomato than mere 'superfood'. While it has long been credited with cutting cholesterol and preventing some cancers, the fruit now appears to have two more healthgiving be
阅读空间
人们常说打哈欠会传染，每次你一打呵欠，周围的人也会跟着打哈欠。难道哈欠真的可以传染，还是仅仅是巧合而已？我们来看看神经学家是怎么说的吧！ A yawn is an instinctive behavior: You don't
阅读空间
You need to take proper care of your eyes to maintain good eyesight. There are few fundamental rules that have to be done for good eye care. As you know very well that exposure to sun is very bad for the eyes. Similarly, if you use computer for long
英语小短文
On its website, a history of the company makes no mention of leador indeed of Thomas Midgleybut simply refers to the original product as containing a certain combination of chemicals. 在它的网站上，公司的历史没有提及铅──也没有提
万物简史
By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo
万物简史
Lead is a neurotoxin. Get too much of it and you can irreparably damage the brain and central nervous system. Among the many symptoms associated with overexposure are blindness, insomnia, kidney failure, hearing loss, cancer, palsies, and convulsions
万物简史
美国暂停与俄罗斯的军事合作 WASHINGTON, March 3 (Xinhua) -- The U.S. Defense Department on Monday evening said that it is suspending all military-to-military engagements with Russia because of Moscow's military movement in Ukraine. The su
英语新闻
If you were going to a restaurant and wanted a healthier option, 如果你去饭店，你想吃得健康一点， which would you choose, grilled or fried chicken? 你会选择哪种食品呢，烤鸡还是炸鸡？ Now most people would answer grill
TED演讲教育篇