单词：barium bromofluoride
单词：barium bromofluoride 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
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20本英文音韵童谣小书（文本+音频）
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
AS IT IS 2016-06-22 Brexit Vote Is Too Close to Call Opinion studies in Britain show almost equal support for staying and remaining in the European Union ahead of a vote on the issue Thursday. British Prime Minister David Cameron made an appeal Tuesd
2016年VOA慢速英语(六)月
凯文布莱尔并不像一个抑郁的小孩：他是篮球队队长，参加各种派对，幽默并且自信。但它讲述的是有一个晚上他认识到拯救他自己的人生，他需要的只是说四个字。
TED演讲集:人生经验与告白
今天要讲的三个习惯用语都是和零碎的小东西有关。他们之间的区别只是使用的场合不同，或者是来源不一，用法相近。现在我们就分别为各位讲解这三个习惯用语。他们是：odds and ends, knic
美国习惯用语
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
Grammar Girl here. Today's topic is words that can get you into trouble. Guest-writer Bonnie Trenga writes: Once upon a time, some mistaken citizens stood up for American principals, p-r-i-n-c-i-p-a-l-s. Across the Atlantic, a nutty queen sat on her
英语语法 Grammar Girl
一个历史性的节点变成一场历史性的闹剧，腐国脱欧公投这事儿真是闹个不停从全球瞩目的公投结果脱欧卡梅伦撩膀子不干了英国人民悔了苏格兰嚷嚷着要独立入欧欧盟决定或把英语剔除欧盟
英文语法词汇
英国脱欧迎来戏剧性变化。当地时间3日，英国高等法院裁定，政府在正式启动脱欧程序前需经议会批准。英国政府对这一裁定表示失望，并第一时间表示将上诉至最高法院。不少公司在英国的
英文语法词汇
AS IT IS 2016-07-22 London's Businesses Look to Move after Brexit Ten London start-up businesses have made inquiries about moving to Berlin since Britain voted to leave the European Union. The business development group Berlin Partner made the announ
2016年VOA慢速英语(七)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
Ethiopia will accomplish the construction at any cost whether donors continue funds or not. The giant Gibe III dam, now being built on the Omo River in southwestern Ethiopia is a boon for some, a problem for others. Supporters say it will provide ele
VOA标准英语2010年(九)月
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
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
NEW DELHI, March 29 (Xinhua) -- Leaders of the five-nation BRICS bloc have reached important consensus in a just-concluded summit here, the Chinese delegation said Thursday. The summit is a success as it has again showcased the cooperative partnershi
英语新闻
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
Leaders from some of the world's largest developing economies -- Brazil, Russia, India, China, and South Africa, the so-called BRICS -- called Thursday for a more representative international financial structure. Wrapping up a summit Thursday in New
英语新闻
SANYA, Hainan, Dec. 4 (Xinhua) -- The five BRICS nations intend to focus and work together on developing alternative energy sources. When Bu Xiaolin, vice governor of China's coal-rich Inner Mongolia autonomous region, spoke over the weekend in front
英语新闻
GENEVA, May 17 (Xinhua) -- Health Ministers from Brazil, Russia, India, China and South Africa met here on Tuesday, to prepare for the BRICS Health Ministerial Meeting which is to be held in Beijing on July 11, 2011. The preparatory discussion was co
英语新闻