[化] 氟化三氧氯

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(138) / 评论(0)

Scientific American(十二)月

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(103) / 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(133) / 评论(0)

口腔临床英语对话

一生的收获--推荐

He was 11 years old and went fishing every chance he got from the dock at his familys 1)cabin on an island in the middle of a New Hampshire lake. On the day before the 2)bass season 3)opened, he and his father were fishing early in the evening, catch

发表于:2019-01-08 / 阅读(88) / 评论(0)

英语美文

悬崖边的疯狂：骇人的新潮流

A face peers over the edge several hundred feet above me. It is a grown man gripped by a morbid elation as he looks down on a sheer drop to the rocks, the beach where I am standing and the sea. 一个成年男子站在几百英尺高的悬崖边缘往下

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阅读空间

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(115) / 评论(0)

VOA标准英语2010年(十)月

环球英语 — 41：Nile Perch

Voice 1 Hello. Im Elizabeth Lickiss. Voice 2 And Im Marina Santee. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 What are you

发表于:2019-01-19 / 阅读(83) / 评论(0)

环球英语 Spotlight

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

经济学人157:哈罗德品特的《昔日》

Harold Pinter's Old Times 哈罗德品特的《昔日》 Ah yes, I remember it well 是的，我都记得 A mysterious play about the tricks of memory returns to London 关于记忆之隙的神秘戏剧重登伦敦舞台 She says tomato, I say nothin

发表于:2019-01-27 / 阅读(87) / 评论(0)

经济学人文艺系列

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(112) / 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(110) / 评论(0)

英语单词荟萃

2006年VOA标准英语-Experts See Hope for Reversing Drylands Degrada

By Gilbert da Costa Abuja 16 October 2006 An international campaign to draw attention to the huge agricultural potential of the Sahel drylands of Africa is gaining ground, with a recent workshop in Niamey, the capital of Niger. The campaign seeks to

发表于:2019-02-02 / 阅读(212) / 评论(0)

2006年VOA标准英语（十月）

2007年VOA标准英语-Rock Star Sheryl Crow Adds Voice to Fight Again

By Rosanne Skirble Washington 01 April 2007 The wife of presidential candidate John Edwards renewed her fight against breast cancer this week. Elizabeth Edwards is one of three million women in the United States living with the disease. Of the 275,00

发表于:2019-02-04 / 阅读(137) / 评论(0)

2007年VOA标准英语（四月）

美国原油产量超沙特阿拉伯

But first which country is the world's biggest crude oil producer? Saudi Arabia, right? No, wrong, there's a new number one. Saudi Arabia has been knocked off its perch by the United States. According to the latest report from Bank of America, US pro

发表于:2019-02-06 / 阅读(86) / 评论(0)

英语新闻

Girls of summer 夏日女孩

在还是小女孩的时候，夏天是我们的，那时，我家住在田纳西河畔。在那些永无尽头、一天天彼此交融的湿润夏日里，我们撒了野地跑着。没有学校的管束，没有规则的羁绊，没有父母的训诫

发表于:2019-02-07 / 阅读(124) / 评论(0)

实用英语

Nadal grabs sixth French Open title

PARIS, June 5 (Xinhua) -- World No. 1 Rafael Nadal defeated the third seed Roger Federer in four sets to win the French Open title for the sixth time on Sunday,Nadal, 25, took the opening two sets 7-5, 7-6 (3) before the 29- year-old Swiss pulled one

发表于:2019-02-07 / 阅读(111) / 评论(0)

英语新闻

The Bat, the Birds and the Beasts

The Bat, the Birds and the BeastsA great conflict was about to come off between the Birds andthe Beasts. When the two armies were collected together the Bathesitated which to join. The Birds that passed his perch said: Come with us; but he said: I am

发表于:2019-02-08 / 阅读(114) / 评论(0)

英语美文

英语美文：Catch of a Lifetime 一生的收获

发表于:2019-02-09 / 阅读(83) / 评论(0)

英语美文

英语美文：一生的收获Life time Catch

He was 11 years old and went fishing every chance he got from the dock at his family's cabin on an island in the middle of a New Hampshire lake. On the day before the bass season opened, he and his father were fishing early in the evening, catching s

发表于:2019-02-09 / 阅读(103) / 评论(0)

英语美文

一生的收获

He was 11 years old and went fishing every chance he got from the dock at his family's cabin on an island in the middle of a New Hampshire lake. 他11岁那时，只要一有机会，就会到他家在新汉普郡湖心岛上的小屋的码头上钓鱼

发表于:2019-02-18 / 阅读(85) / 评论(0)

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9-heptadecanecarboxylic acid

augmented Phillips curve

automatic recalculation