单词：copper(ii) hydroxyfluoride
单词：copper(ii) hydroxyfluoride 相关文章
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Beauty is only skin deep. And the beauty of shiny white teeth is even less deep. Because a new study shows that fluoride forms a thinner protective shiel
Scientific American(十二)月
07 牙病的预防与治疗 DATE=2-27-01 TITLE=SCIENCE IN THE NEWS #2113 - (1)Dental Health BYLINE=Nancy Steinbach VOICE ONE: This is Sarah Long. VOICE TWO: And this is Bob Doughty with Science in the
科技之光
Is it necessary to have cavities in the baby teeth repaired? 乳牙蛀成了洞还有必要补上吗？ If the baby teeth are going to fall out, I don't think that it matters if they become decayed. 如果乳牙是要脱落的，我想蛀了也没有关
口腔临床英语对话
(WA) I was really glad when your club invited me to share my coin collection. It's been my passion since I collected my first Lincoln cent in 1971; that's the current penny with Abraham Lincoln's image. Just a little history before I start in on my
托福听力短文
Humulone 律草酮 Huperzine Serrate P.E 千层塔提取物 Hydroginkgolic acid 氢化白果酸 Hydroginkgolinic acid 氢化白果亚酸 p-Hydroxyacetophenone 对羟基苯乙酮 p-Hydroxybenzylalcohol
医务英语
1.Food _______ is a big industry in this area. A.projecting B.promising C.processing D.president 2.We never _______ that John would become a doctor. A.respected B.wondered C.suspected D.estimated 3.Don't be too _______ on your children. They are stil
大学四六级阅读
South Africa's recycling industry processes more than a million tons of scrap metal every year. This has created an opportunity for thieves. They are stealing copper wiring from city streets and selling it at local scrap yards. The city of Cape Town
VOA标准英语2008年(十二月)
Researchers Say Malaria Drug Could Also Treat Cancer Scientists know that human cancer cells grow by getting energy from adjacent tumors, where cells have begun to self-destruct. The spread of cancer is accelerated by the death of these cells. This p
VOA标准英语2012年(三月)
High Prices Trigger Rise in Copper Thefts When you heard the word copper in old gangster movies, you were talking about the good guys: the police, the cops. Now, when you speak of copper and crime, youre referring to the bad guys. A combination of ci
VOA标准英语2011年(十月)
A cluster of villages in China's Guizhou province has been plagued by an outbreak of disease that damages teeth and bones. Now, a new study by Chinese and American researchers puts the blame on polluted coal burned in home fireplaces. In small quanti
VOA标准英语2010年(十)月
The Streaming down the Yangtze team has arrived in the city of Tongling, Anhui Province. Owing to its copper deposits, it was an important center in ancient China for bronze production. The scale of the copper industry has gradually increased and it
2018CRI中国国际广播电台
Ah yes.The ol' fluoride rinse at the dentist. Not pleasant. But hey, good for your teeth, right? 没错，这是牙医洗牙用的含氟漱口水。确实够闹心的。但毕竟对你的牙齿有益不是吗? Well now materials scientists have been
2018年科学美国人1月
Varden paused, and put away a good mouthful of whisky. Well? cried several breathless voices. Well, said Varden, Im not ashamed to say I went out of that house like an old buck-rabbit that hears the man with the gun. There was a car standing just out
英文短篇小说
For the last two years, the Los Angeles area has seen an increasing number of metal thefts, reported Paul Moyer, co-anchor of the local 6 oclock news. Sometime before dawn Wednesday, thieves had stolen the copper wire out of six lamp posts. A day ear
365个英语简短小故事
SCIENCE IN THE NEWS - November 26, 2002: Dental Health By Nancy Steinbach VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with Science in the News, a VOA Special English program abo
科技之光
今天我们要学的词是 fluoride. Fluoride 氟化物。The U.S. government is lowering the recommended amount of fluoride added to drinking water for the first time in more than 50 years. 美国政府50多年来首次降低饮用水建议添加的氟
英语单词荟萃
In January 2015, a fire in one of Russia's largest university libraries damaged more than 1 million historical documents, an incident which some media described as a cultural Chernobyl. 2015年1月，俄罗斯最大的大学图书馆之一发生了火灾
英语新闻
Unionized workers at Chile's Codelco, the world's largest copper producer, have begun a 24-hour strike in a dispute with the government over the future of the company. The workers walked off the job Monday over modernization（现代化） plans that
英语新闻
A human hair consists mainly of a protein called Keratin. It also contains some moisture and the trace metals and minerals found in the rest of the body. 人类的头发主要由一种叫角朊的蛋白质组成，并含有水分及在身体其他部分
阅读空间
How the First Head Was TakenOne day the Moon, who was a woman named Kabigat, sat out in the yard making a large copper pot. The copper was still soft and pliable like clay, and the woman squatted on the ground with the heavy pot against her knees whi
英美文化