[化] 氟化造渣

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(193) / 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(146) / 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(180) / 评论(0)

口腔临床英语对话

【听英文对话做选择】大学奖学金

1. What was the main focus of the survey? A. leisure sporting activities B. average age of athletes C. durability of sporting equipment 2. Which group seems to be most active in sports? A. 18-26 B. 27-35 C. 36-45 3. Which sport was cited as the third

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坚强的意志Strong Will

Since I go to high school, I live in the school and stay away from my parents. I have three roommates, at the beginning, we have trouble in staying in the same room, but now we have got used to it. One of my roommates impresses me so much, since she

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英语作文

VOA标准英语2009年-Reform Agenda Lagging as Kenya Enters

At this time next year, Kenyans are hoping for a new constitution, implemented under reformed government institutions. When it comes to politicians, though, Kenyans are long-accustomed to disappointment. Alan Boswell | Nairobi 15 December 2009 Kenyan

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VOA标准英语2009年(十二月)

VOA慢速英语 2007 0406a

This is the VOA Special English Economics Report. Economics and weather have a lot in common. Knowing what conditions will be like weeks or months in the future is not easy. One thing that helps economists predict the future is the index of leading

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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

VOA标准英语2013--India’s Jobless Hit Hard by Lagging Economy

Indias Jobless Hit Hard by Lagging Economy Evidence of Indias slowing economy can be seen from local car dealerships - where auto sales are set to decrease for the first time in 10 years - to job training workshops where unemployed young people like

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John: Hello, you're listening to Real English from BBC Learning English. I'm John. Helen: And I'm Helen. John: Here on Real English, you can learn words and phrases which you might not find in your dictionary. Helen: That's right. 希望您在今天的

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英语听力精选进阶版

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(150) / 评论(0)

2018年科学美国人1月

每日一词【204】inherit：继承

今天我们要学的词是inherit。 Inherit是继承的意思。Sam从他叔叔那儿继承了一大笔财产就是 Sam inherited a fortune from his uncle. Jenny继承了妈妈的红头发，可以说 Jenny inherits her red hair from her mom. 法国新

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英语每日一词

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(154) / 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(146) / 评论(0)

英语单词荟萃

落后不是输 Lagging Behind Doesn’t Mean Lose

When I was very small, I like to read the books with pictures, because I did not know the words. One day, I saw the interesting pictures in the book, I saw the turtle and the rabbit, but I did not know what it said, so I asked my mom. She told me tha

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英语作文

China wins men's team title in gymnastics worlds

TOKYO, Oct. 12 (Xinhua) -- China won the men's team gold medal of the gymnastics world championships for the fifth time in a row Wednesday, holding off host Japan and the United States, which took the second and third place. China, the 2008 Beijing O

发表于:2019-02-07 / 阅读(178) / 评论(0)

英语新闻

TED演讲:曝光政府腐败的战斗(1)

Once upon a time, the world was a big, dysfunctional family. 很久以前，世界是个很大却不和谐的大家庭。 It was run by the great and powerful parents, and the people were helpless and hopeless naughty children. 这个家庭被伟大的

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TED演讲国际问题篇

CCTV9英语新闻：Agriculture Min: Food security a strategic focus

In the modernisation process, agriculture is lagging compared with other sectors, such as urbanization, industrialization and information technology. We need to restructure and upgrade the business models and production systems which focus on technol

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cctv9英语新闻2016年

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健康的小狗和有残疾的小狗，你会选择哪个作为自己的宠物呢?在很多人追求完美的时候，一个小男孩却给我们上了生动的一课。 A store owner was tacking a sign above his door that read Puppies For Sale. Sign

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