单词：uranous fluoride
单词：uranous 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
August the 9th is International Day of the World's Indigenous People. It is a time for the world to understand the problems of indigenous peoples around the world. The day was created by the United Nations General Assembly in 1994. It wanted to stren
英语课程学习计划和讲义
Duracell is perhaps the worlds best known make of batteries. The brand is owned by the multinational conglomerate Proctor and Gamble. Duracell was founded by scientist Samuel Ruben and entrepreneur Philip Rogers Mallory. They developed an alkaline te
各大品牌英文介绍
By Bill Gasperini Moscow 01 January 2006 Russia's natural gas monopoly Gazprom headquarters in Moscow, Sunday, Jan. 1, 2006 Russia began the process of cutting off natural gas supplies to neighboring
2006年VOA标准英语（一月）
By Doug Levine Washington 15 July 2006 Every now and then a young guitar player comes along with the promise of being the next Eric Clapton or Jimi Hendrix. The arrival of Native American guitarist Mato Nanji may mean the wait for a new rock superst
2006年VOA标准英语（七月）
By Catherine Drew London 22 January 2008 This weekend saw millions of Muslims mark the day of Ashura around the world. In central London, about 3,000 Shi'a Muslimsgathered to commemorate the martyrdom of Hussain Ibn Ali, thegrandson of the Islamic pr
VOA标准英语2008年（一月）
By Challiss McDonough Nabatiyeh, Lebanon 30 January 2007 Shi'ite Muslims around the world Tuesday held ritual celebrations marking the holy day known as Ashura, which commemorates the death of Muhammad's grandson. The Shi'ite ceremonies in Lebanon f
2007年VOA标准英语（一月）
Bangladesh's government says all mutinous border guards have ended their rebellion. That word came after army tanks took positions outside the Dhaka headquarters of the border force. Some officials put the death toll from the two-day uprising at mor
VOA标准英语2009年(二月)
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
By Naomi Schwarz Dogon Country 04 January 2007 In this arid area near the eastern edge of Mali near the Burkina Faso border, the indigenous Dogon people struggle to maintain their culture and traditional ways of life since the end of the colonial er
2007年VOA标准英语（一月）
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
By Cathy Majtenyi Nairobi 11 December 2006 A senior U.N. official concerned with the plight of indigenous communities around the world is in Kenya to assess the situation of pastoralist, hunter-gatherer, and other indigenous communities in the East
2006年VOA标准英语（十二月）
ORLANDO, Florida, Feb. 26 (Xinhua) -- Kevin Durant scored 36 points and won his first All-Star MVP trophy in West's 152-149 victory over the East. Kobe Bryant had 27 points and overtook Michael Jordan's career scoring record in All-Star in his 14th A
英语新闻
North Korea has announced new progress in its nuclear weapons development, drawing expressions of regret and concern from the United States and its regional partners. A senior U.S. envoy is in the region discussing a response. South Korea vowed a st
VOA标准英语2009年(九月)
STEVE INSKEEP, HOST: In the age of Snapchat and Instagram, where almost anybody can have the equivalent of a photo studio in their hands, some people still use old-style photo booths. That's especially true in Japan, where the photo booths are called
2017年NPR美国国家公共电台7月
STEVE INSKEEP, HOST: In the age of Snapchat and Instagram, where almost anybody can have the equivalent of a photo studio in their hands, some people still use old-style photo booths. That's especially true in Japan, where the photo booths are called
2017年NPR美国国家公共电台7月