单词：cis-8-ethyl-10-phenyl-dehydrolobelidiol
单词：cis-8-ethyl-10-phenyl-dehydrolobelidiol 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
Many of the Burgess specimens have now been assigned to living phyla just where Walcott put them in the first place. 许多布尔吉斯标本现在已经归到活着的动物的门里就是沃尔科特最初放置它们的地方。 Hallucigenia and s
万物简史
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
This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro
Scientific American(三)月
Fun Fact: Alligators Can Regrow Teeth 有趣的事实：短嘴鳄可以再长牙齿 Fun fact about alligators: they can regrow any of their eighty teeth up to fifty times. Which is pretty impressive, especially compared to us relatively dentally chal
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Melody 1 from the Other World In October on the east coast of Australia migrating humpback whales 2 pass very close to the shore. With the help of Max Egan, we went to film them near Byron Bay. It was
英语沙龙2004全年合辑下
Todd:OK. Jamie. We're back. Jamie: OK. Todd: Jamie, you're a businessman. Jamie: Sometimes. Todd: OK, so.. Jamie: Not his week. Todd: Not this week! OK. Um. we're going to talk about globalization. Jamie: OK. Todd: What do you think about globalizati
英语访谈对话
This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ
Scientific American(四)月
Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the
Scientific American(十一)月
This is Morning Edition from NPR news. I am Steve Inskeep and I am Susan Stamberg. Russian and Chinese forces today begin 8 days of joint military exercises. Some ten thousand troops are expected to take part, making this their largest joint military
2005年NPR美国国家公共电台
By Robert Raffaele Washington 27 March 2008 A new type of surgery may make it easier for patients who would otherwise require a more invasive procedure. The new type of operation makes it possible for doctors to remove unwanted tissue through a patie
VOA标准英语2008年（三月）
Locals in Uganda are lauding a construction project financed by China which is creating the East African country's largest hydroelectric power plant. The 600-megawatt (MW) Karuma Hydroelectric Power Plant is located at the mid-western district of Kir
2018CRI中国国际广播电台
Todd: OK. Jamie. We're back. Jamie: OK. Todd: Jamie, you're a businessman. Jamie: Sometimes. Todd: OK, so.. Jamie: Not his week. Todd: Not this week! OK. Um. we're going to talk about globalization. Jamie: OK. Todd: What do you think about globalizat
原版英语对话1000个
As was the common practice with the gods of Olympus，Zeus and Hermes were visiting the world in disguise．One day they came to a village．At a thousand house sthey knocked，and a thousand times they were refused rest and food and drink．At last
阅读空间
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
英语新闻
The UN Children's Fund, in partnership with diaper-maker Pampers, is launching a global campaign to eliminate tetanus by 2012. UNICEF reports the disease kills about 140,000 newborn infants and 30,000 mothers every year in the poorest countries in t
VOA标准英语2008年（十月）
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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