[化] 氟化硼; 三氟化硼

SSS 2010-12-29

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

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Scientific American(十二)月

纯正地道美语第6期(外教讲解):The Weekend-Road Tri

The Weekend - Road Trip A: So, are we all ready to go? B: Yup, I think so. The cars packed; we have munchies and music, and the maps in the car. A: Did you get the camera? B: Got it! Did you fill up the tank? A: Yup, its all set. B: Youre sure were n

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纯正地道美语

冀教版高中英语必修二--Unit Six PLANNING A TRI

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得 10 到 30 积分的奖励 ! Thank you ！

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冀教版高中英语必修二

"The Truman Doctrine"

Mr. President, Mr. Speaker, Members of the Congress of the United States: The gravity of the situation which confronts the world today necessitates my appearance before a joint session of the Congress. The foreign policy and the national security of

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名人演讲

Dental Health

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

发表于:2018-12-07 / 阅读(141) / 评论(0)

科技之光

口腔临床英语对话第29期:正畸治疗(2)

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

发表于:2018-12-27 / 阅读(175) / 评论(0)

口腔临床英语对话

新编英语教程第五册unit07_2_mouse_cloning_begins_bio-industri

发表于:2018-12-29 / 阅读(129) / 评论(0)

新编大学英语阅读部分

VOA慢速英语2018 新报告揭秘稀有蓝钻的历史

New Report Shares Secrets of Rare Blue Diamonds History The Hope Diamond is one of the worlds most famous jewels. It was in the possession of a series of people: kings, bankers, rich women and thieves, before its arrival 60 years ago at the Smithsoni

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2018年VOA慢速英语(八)月

听歌学英语：Ready-Tritonal

You're ready, I'm ready, you'll be my everything 你准备好了我也是你会是我的一切 I wanna give it to you 我想为你倾其所有 So steady, so heavy, now this is everything 我们的爱情稳固又热烈这就是一切 Without you, I do

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听歌学英语

VOA常速英语2007年-US Looks at Ways to Get Help From Pakistani Tri

By Al Pessin Pentagon 19 November 2007 The U.S. Defense Department says a series of ideas for a new effort to try to get Pakistani tribal leaders to cooperate in the fight against terrorists is just a staff document and is far from any senior level c

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VOA常速英语2007年（十一月）

2006年VOA标准英语-Researchers Say a Type of Virus May Contri

By Pat Harris Washington 12 April 2006 Watch Fat Virus report Obesity is a growing problem around the world. In the United States, for example, almost one-third of the adult population is overweight.

发表于:2019-01-09 / 阅读(166) / 评论(0)

2006年VOA标准英语（四月）

VOA标准英语2010年-Researchers Say Several Factors Contri

Scientists don't know what causes autism, but besides a genetic predisposition, they are now focusing on environmental exposure, or a combination of the two. A conference on autism is taking place in (the eastern state of) Pennsylvania. The aim is to

发表于:2019-01-13 / 阅读(138) / 评论(0)

VOA标准英语2010年(八)月

VOA标准英语2010年-Coal Burning Linked to Fluoride Diseas

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

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VOA标准英语2010年(十)月

科学美国人60秒 SSS 海狸牙齿的奥秘

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

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2018年科学美国人1月

SCIENCE IN THE NEWS - Dental Health

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

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科技之光

New Yorkers Take Transit Woes in Stride

New Yorkers Take Transit Woes in Stride NEW YORK Life regained some semblance of normalcy on Thursday for New Yorkers affected by superstorm Sandy, as public transportation started to come online and millions of people returned to work. But for those

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英语新闻

VOA常速英语2008年-Former Liberian Combatant Makes Admissions, Tri

By Nico Colombant Monrovia 23 February 2008 Former fighters in Liberia's civil war are making statements before the country's ongoing Truth And Reconciliation Commission, trying to move on by admitting what they did. VOA's Nico Colombant caught up in

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VOA常速英语2008年（二月）

学个词 Learn a Word-VOA英语教学 2280-fluoride

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

发表于:2019-02-02 / 阅读(145) / 评论(0)

英语单词荟萃

69 Austrian athletes to compete at London Olympics

VIENNA, July 6 (Xinhua) -- The Austrian Olympic Committee (OOC) has nominated 69 athletes to take part in the 2012 London Summer Olympic Games, the APA reported on Friday. This will make it the smallest team since the 1976 Montreal Games where 64 Aus

发表于:2019-02-02 / 阅读(210) / 评论(0)

英语新闻

Austrian 2012 Olympic team takes shape

VIENNA, May 9 (Xinhua) -- The Austrian Olympic Committee (OeOC) nominated a further 13 athletes for its 2012 London Olympic Games team on Wednesday, bringing the total to 37 athletes across 12 sporting disciplines. OeOC President Karl Stoss said he p

发表于:2019-02-02 / 阅读(229) / 评论(0)

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