单词：nitrosyl fluoride
单词：nitrosyl fluoride 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
分集介绍：导数，商数，正弦和余弦 Derivatives.of.products.quotients.sine.cosine
麻省理工学院公开课：单变量微积分
分集介绍：导数，斜率，速度与变化率 Derivatives.slope.velocity.rate.of.change
麻省理工学院公开课：单变量微积分
[全屏观看] 点击右键- 另存为 可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏，它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标
英语对接游戏
By Joe Bavier Abidjan 27 March 2006 Compound of the house where former Liberian warlord Charles Taylor lives near the sea side town of Calaber Supporters close to deposed Liberian leader Charles Taylo
2006年VOA标准英语（三月）
A new report by the U.N. refugee agency finds the number of asylum seekers in industrialized countries increased in 2008 for the second consecutive year. It says asylum requests have been rising in part because of the higher number of applications f
VOA标准英语2009年(三月)
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 United Nations refugee agency says it is concerned about the fate of hundreds of irregular migrants, including asylum seekers and refugees, following the closure of a makeshift camp in the Greek city of Patras. The UNHCR says it fears many of th
VOA标准英语2009年(七月)
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
By Jim Malone Washington 18 April 2008 Democratic presidential contender Hillary Clinton faces a crucial test in Tuesday's presidential primary in Pennsylvania. Clinton is counting on a convincing win over rival Barack Obama in Pennsylvania to keep a
VOA常速英语2008年（四月）
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
HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure
健康与经济
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
欧洲顶尖流行电子乐组合Sylver翻唱自ABBA经典歌曲的《Lay All Your Love On Me》，经过重新编曲带给你不一样的听觉体验。 Lay all your love on me-Sylver i wasn't jealous before we met now every woman i see is a potential threat and i'm possessive, it isn't
音乐咖啡厅
A small corner shop in suburban Sydney is an unlikely place to hear the horrors that force people from their homes and into the devious and dangerous world of people smugglers. Hassan Abotbeek fled Iraq and arrived in Australia by boat more than seve
英语杂谈
Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833
听播客学英语