单词：N-ethylpyrrole
单词：N-ethylpyrrole 相关文章
Science fiction is definitely not pure science, but neither is it pure fiction. This literary genre, argues science fiction writer Ben Bova, stands as a bridge between science and fiction, between reason and emotion. Moreover, science fiction is not
英语散文阅读
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
Muslim Brotherhood Ready for More Active Role in Jordan From VOA Learning English, this is IN THE NEWS in Special English. The Muslim Brotherhood is one of the largest Islamic groups in the Arab world. For years, the Brotherhood has been banned in a
2013年VOA慢速英语(六)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
The Beijing Municipal Administration of Hospitals has launched a role-swapping program to try to smooth the relationship between doctors and patients. CRI's Xie Zhao explains. Reporter: The role-swapping program has recruited volunteers with aim of h
世界各地新闻集锦
Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. NationalGeographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti
国家地理2008年
By Leta Hong Fincher Since September 11th, 2001, the United States has waged war on terrorism while advancing an agenda of democracy and freedom. But some U.S. critics say the policies of the Bush adm
VOA2004（下）--新闻盘点
Anderson Silva in Hollywood film role RIO DE JANEIRO, Nov. 4 (Xinhua) -- Brazil's Ultimate Fighting middleweight champion Anderson Silva is set to star alongside Steven Seagal in a new Hollywood film. Silva will fly to Los Angeles this week to begin
英语新闻
By Naomi Schwarz Dakar 07 September 2007 In southern Senegal and the Gambia, home to the Mandinka ethnic group, the rainy season also brings the appearance of the Kankuran, a man who takes on the role of an age-old spirit and guardian of the Mandinka
2007年VOA标准英语（九月）
By David Gollust Secretary of State Colin Powell said Friday that Libya's alleged role in a plot against Saudi Arabia's Crown Prince Abdullah remains an obstacle to further normalization of U.S.-Libya
VOA2004（下）--新闻盘点
By David Gollust U.S. Deputy Secretary of State Richard Armitage is welcoming Friday's end of the three-week occupation of the Imam Ali Shrine in Najaf by Shi'ite militiamen as a great victory for Ira
VOA2004（下）--新闻盘点
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)
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
Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. National Geographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti
自然百科2008年
今天我们要学的词是role model。 Role model, 榜样。 For black women across the country, Michelle Obama is a new role model, 对于美国各地的黑人女性来说，米歇尔奥巴马是她们新的楷模。奥巴马当选美国总统后，
英语每日一词
Turkish foreign minister Ali Babacan is in Tehran to help find a solution to the ongoing tensions over Iran's nuclear aspirations. Turkey is increasingly playing an active role in working to resolve tensions across the Middle East. Earlier this year
VOA标准英语2008年（八月）
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
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
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