八氟化锇 {氟化锇(VIII)}

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

发表于:2018-12-02 / 阅读(113) / 评论(0)

Scientific American(十二)月

"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

发表于:2018-12-04 / 阅读(335) / 评论(0)

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(83) / 评论(0)

科技之光

VOA标准英语2008年-US Defense Chief Calls for a Balanced US Milita

Four months before the Bush administration leaves office in January, Defense Secretary Robert Gates laid out his vision for U.S. military strategy on Monday, saying the Pentagon needs to strike a balance between conventional capabilities and the abi

发表于:2018-12-16 / 阅读(102) / 评论(0)

VOA标准英语2008年（九月）

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(112) / 评论(0)

口腔临床英语对话

英文有声畅销书-秘密 3-04 Focus On Prosperity

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到好的听力原文，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！

发表于:2018-12-30 / 阅读(77) / 评论(0)

有声畅销书-秘密

语感启蒙4 A-Tu-Li-Ta 阿图丽塔

图片1

发表于:2019-01-01 / 阅读(161) / 评论(0)

清华幼儿英语语感启蒙

各国名人英文介绍-Preity Zinta

Preity Zinta is one of Indias most celebrated actresses. She has appeared in both Bollywood and English-language movies. In addition to acting, she is a writer, stage performer and philanthropist. She is also a businesswoman and co-owns a top Indian

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各国名人英文介绍

2006年VOA标准英语-US Soccer Team Set to Play Italy at World Cup

By Parke Brewer Cologne 16 June 2006 The U.S. Soccer team will try to bounce back from its opening 3-0 (Group E) loss to the Czech Republic at the World Cup. But as VOA Sports Editor Parke Brewer reports from Germany, it will not be easy. ----------

发表于:2019-01-07 / 阅读(132) / 评论(0)

2006年VOA标准英语（六月）

Societe Generale chairman resigns

Societe Generale chairman resigns 法国兴业银行行长辞职 Societe Generale's chairman Daniel Bouton has announced his resignation, saying the personal attacks against him risked harming the bank. Mr Bouton has faced increasing criticism ever since a ro

发表于:2019-01-07 / 阅读(106) / 评论(0)

英语新闻

英语歌曲:vanessa carlton--Nolita fairytale

vanessa carlton--Nolita fairytale I know, you know, We don't see And so our truths wait patiently I walk the streets with a song in my head We ebb and we flow so Got my toes on my pup at the foot of my bed My heart always seems to know Now take the g

发表于:2019-01-10 / 阅读(119) / 评论(0)

E乐吧

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

发表于:2019-01-14 / 阅读(90) / 评论(0)

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

发表于:2019-01-20 / 阅读(83) / 评论(0)

2018年科学美国人1月

Controlling Locusts with Technology

62 利用现代科技手段控制蝗虫 DATE=6-26-01 TITLE=AGRICULTURE REPORT - Controlling Locusts with Technology BYLINE=George Grow (Start at 59

发表于:2019-01-30 / 阅读(110) / 评论(0)

科技之光

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

发表于:2019-01-30 / 阅读(100) / 评论(0)

科技之光

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(86) / 评论(0)

英语单词荟萃

OMG美语：频道 OMG!美语 Outta! Gotta!

1) outta = out + of 没了，走了 2) gotta = got + to 必须做 3) musta = must have = 一定 Were running outta time! 我们没时间啦！白洁最近听到一首很好听的中文歌叫：时间都去哪儿了。

发表于:2019-02-02 / 阅读(92) / 评论(0)

OMG美语

VOA常速英语2008年-Serbia's Tadic Re-Elected President by Narrow M

By Barry Wood Belgrade 04 February 2008 Incumbent president of Serbia Boris Tadic won Sunday's presidential election, defeating by a narrow margin a pro-Russian nationalist candidate. VOA's Barry Wood reports from Belgrade. Boris Tadic (l), 03 Feb 20

发表于:2019-02-06 / 阅读(98) / 评论(0)

VOA常速英语2008年（二月）

英文摇滚歌曲：The Offspring - OC Guns

Tiki tiki tiki tiki tiki, Waddup holmes? You guero you puto! Pendejo! Cabron Tiki tiki tiki tiki tiki, Waddup holmes? Shoot them in the back when the beat, beat on Tiki tiki tiki tiki tiki, Waddup holmes? Chingado de puto! Pendejo! Cabron Tiki tiki t

发表于:2019-02-18 / 阅读(79) / 评论(0)

英文摇滚歌曲

CNOOC takes over Nexen

BEIJING, Feb. 26 (Xinhua) -- China National Offshore Oil Corporation (CNOOC) announced Tuesday that it has closed a deal to acquire Canada's Nexen Inc. CNOOC, China's largest offshore oil and gas producer, said in a statement on its website that the

发表于:2019-02-19 / 阅读(107) / 评论(0)

英语新闻

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asymptotically independent