单词:tantalifluoride
单词:tantalifluoride 相关文章
Abby: hi, my name's Abby. What's your name? Colin: I'm colin. It's nice to meet you. What do you do? A: I'm a freelance English teacher. How about you? C: I'm in between jobs at the moment. A: what kind of job are you looking for? C: I'd like to find
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
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
Ali Baba's Farm Ali Ba-ba, he has a little farm. On his farm he has some little lambs. Baa, Baa cry his little lambs. On the farm of Ali Ba-ba. Ali Ba-ba, he has a little farm. On his farm he has some little cows. Moo, Moo cry his little cows. On the
PEOPLE IN AMERICA – December 29, 2002: Remembering Six Important People By Jill Moss (THEME) VOICE ONE: I’m Mary Tillotson. VOICE TWO: And I’m Steve Ember with the VOA Special English Program, P
Join us for another edition of Travelling with Stupid as we go to one of China's lesser known white beaches, Yintan in Beihai in order to top up our tan. We also take in some of the maritime history of the city and stop off at one of Guangxi's mangro
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
We Profile Five Special People Who Died This Year Written by Katherine Gypson and Caty Weaver (THEME) VOICE ONE: Im Faith Lapidus. VOICE TWO: And Im Steve Ember with People in America in VOA Special English. Today we tell about five special people wh
PEOPLE IN AMERICA - We Profile Five Special People Who Died This Year By Katherine Gypson and Caty Weaver Broadcast: Sunday, December 18, 2005 (THEME) VOICE ONE: I'm Faith Lapidus. VOICE TWO: And I'm
SCIENCE IN THE NEWS -August 13, 2002: Head Bones of a Very Distant Family Member / Freezing the Dead / Tobacco Dangers Greater Than Believed VOICE ONE: This is Sarah Long. VOICE TWO: And this is Bob D
爵士:Vanessa Williams - Close to you 相关介绍 :这位散发优雅气质的黑美人,将自己由里到外的优点全都毫不加以掩饰的表现出来,姣好的外表让她获选为美国第一位非裔黑人摘下美国小姐后冠;匀
MSF: Alarming Scope of Drug-Resistant TB A medical aid group says the spread of multi-drug-resistant tuberculosis is much greater than previously thought. Doctors Without Borders calls the situation alarming. MDR-TB is a form of tuberculosis that doe
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
Weapons Flowing to Somali Militants The military offensive against the al Shabab militia in Somalia has made major advances over the past year. However, al Shabab has not been defeated. U.N. monitors reportedly say the group is receiving weapons from
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
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
By Alisha Ryu Mogadishu 05 January 2007 In Somalia, an alleged message from Osama bin Laden's deputy urging Somalis to launch an Iraq-style guerrilla war against Ethiopian forces there is being taken seriously by a now mostly-disbanded group of mili
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
5 Important Reasons to Slow Down Today Do you find yourself rushing from one task to the next, trying to cram as much as possible into each day? Its great to live a full, productive life but sometimes that doesnt mean speeding up. It means slowing do