单词：tantalic fluoride
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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
Unit 11 Acceptance 接受 Basic Expressions 1. Our price is quite reasonable and other buyers in your market have accepted it. 我们的价格很合理，已经为你们市场的其他买主所接受了。 2. Please accept our offer and confirm the a
外贸实务口语
小学三年级英语,人教新课标版
人教版小学三年级英语上
小学三年级英语,人教新课标版
人教版小学三年级英语上
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
Both my brother and I are outgoing people. He as well as I likes being in the sun. It goes without saying, therefore, that we spend a lot of our free time at the beach. We go there to relax as well as
赖世雄中级美国英语
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
Jo: Hello, this is Real English from BBC Learning English, Im Jo Sun Chen: 黑，你好吗？我是孙晨 Jo: In Real English, we look at words and phrases that you might not find in your dictionary. Sun Chen: 没错。其实英语当中，最常用的就是好多个习惯用语。
地道英语在线听
Economics Report - Gold Keeps Shining, 30 Years After Nixon Ended Gold Standard This is the VOA Special English Economics Report. The best example of something is often called the gold standard. It sets the standard against which other things are mea
2011年VOA慢速英语(四)月
By George Dwyer Washington 28 June 2006 Watch steel report The world's second largest steel producer, Arcelor Steel of Luxembourg, has announced it will merge with the world's largest steel company, Netherlands-based Mittal. The deal, announced on J
2006年VOA标准英语（六月）
French President Nicolas Sarkozy is calling for new international nuclear safety standards, warning radiation leaks at Japan's Fukushima Power Plant could affect the entire world. Sarkozy is calling for nuclear officials from the G20 group of industr
VOA标准英语2011年(四月)
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
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
TRANSPORT AND INSURANCE 装运及保险 Ⅰ. Transport 装运 Transport is an important part in international business. Goods are carried by several means of conveyance -- on road or rail, by sea or air. And in recent years, combined transport which
实用英语
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
2010年工程师TanLe来到TED全球舞台上，带来了富有激情的新面孔。但是在TED妇女中，她讲述了自己的独特经历：关于她的家庭，母亲、祖母和妹妹的故事感受越南，建立新生活。
TED公开课:告女性说
4 Ways to Measure Your Standard of Living Standard of living should not equate to amount of spending. When I sat down to write an article on the countries with the highest standard of living, I thought it would be easy. But, how do you define standar
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