【化学】氟化氢

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(183) / 评论(0)

Scientific American(十二)月

乘车英语对话-Why to Buy a Pass(2)

A: Have you bought a bus pass yet? B: I'm not getting one. A: Why is that? B: It's cheaper if I don't buy one. A: Buying a bus pass will save you money. B: How do you figure that? A: There's no limit to how often you can use your bus pass. B: Really?

发表于:2018-12-02 / 阅读(192) / 评论(0)

实用乘车英语

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(140) / 评论(0)

科技之光

VOA标准英语2012--After 'Gen X', Today's Young Might be ‘Gen E’

After 'Gen X', Today's Young Might be Gen E Americans like to give names to generations. We call those who lived through World War II, the Greatest Generation; those who came of age reading the beatnik poets of the 1950s, the Beat Generation; those f

发表于:2018-12-08 / 阅读(148) / 评论(0)

VOA标准英语2012年(三月)

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(172) / 评论(0)

口腔临床英语对话

音乐咖啡厅:Joshua Hyslop - At All

Oh I've heard the sound of angels wings Slow and sweetly softly fluttering It's been some time since I believed at all at all Oh I've heard the sound of devils tongues How their whispers burned me more than once Oh my disbelief is not enough at all a

发表于:2019-01-03 / 阅读(202) / 评论(0)

音乐咖啡厅

音乐咖啡厅:Joshua Hyslop - Say It Again

Say it again say it again Baby you will be believe it Say it again say it again To my face In the end oh in the end If I don't believe it In the end should I fall from grace Well I don't know How to bring myself to hope No I don't know you at all Oh

发表于:2019-01-03 / 阅读(217) / 评论(0)

音乐咖啡厅

情景英语对话：Why You Moved(1)

A: Are you new in town? B: Yes, I did just move in. A: How do you like it here so far? B: I think its great. A: Where did you move from? B: I was living in El Salvador. A: Why did you decide to move? B: I figured I could have a better life here. A: I

发表于:2019-01-07 / 阅读(154) / 评论(0)

英语情景对话-邻居

英语杂谈：76 Why Don't You Cry About It

I'm so tired, I need sleep I'm talking to my pillow case, what's wrong with me? I make mistakes, but them's the breaks I'm crying out for anyone to come and rescue me Talk about a new wave (Whoa-oh, whoa-oh!) Talk about a way to save the day (Whoa-oh

发表于:2019-01-10 / 阅读(151) / 评论(0)

英语杂谈

舞曲狂欢:Starstylers Ft.Michy - Keep On Moving

歌曲： Keep On Moving 艺人： Starstylers Ft.Michy 音乐星级： ★★★★★ 所属专辑：未知发行年代： 2006 风格： Dance 介绍：关于Starstylers Ft. Michy在网络上很难找到他们的信息，只知道他们好像是一个DJ组合，组合形式跟舞动精灵差不多，Keep On Movi

发表于:2019-01-11 / 阅读(182) / 评论(0)

舞曲狂欢

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(156) / 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(144) / 评论(0)

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

发表于:2019-01-30 / 阅读(146) / 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(141) / 评论(0)

英语单词荟萃

音乐咖啡厅:I'm Just A Little Bit Shy 我只是有点害羞

歌词： Dam dam dubi do Tell me what can I do 告诉我能做什么 I'm just a little bit shy 我只是有些害羞 Dam dam dubi do I really don't know why 我真的不知道是为什么 I'm just a little bit shy 我只是有些害羞 I try to tell you 我试着告诉你 Wuh that I love

发表于:2019-02-02 / 阅读(222) / 评论(0)

音乐咖啡厅

流行美语第117课 - flip-flop / wishy-washy

今天Larry和李华在校园里闲逛，校园里到处都贴满了选举传单。今天李华会学到两个常用语：flip flop和wishy-washy. LL: Hey, Li Hua who do you support for class presiden

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美国之音《流行美语》

ealthy diet may help children with ADHD

BEIJING Jan. 10 (Xinhuanet) -- Keeping a healthy diet may help children with attention deficit hyperactivity disorder (ADHD) in their treatment, a new study revealed. The study was published Monday in the American medical journal Pediatrics. After an

发表于:2019-02-04 / 阅读(208) / 评论(0)

英语新闻

英语杂谈：114 Physicist

[00:00.00]1 HEATHER:I used to rollerskte all the time. [00:28.29]I loved it when I was little.Did you ? [00:31.14]KEVIN:No.I went straight from my pram to a surfboard. [00:35.81]I used to live in the ocean.No wheels required. [00:40.25]2 HEATHER:Well

发表于:2019-02-06 / 阅读(164) / 评论(0)

英语杂谈

Eating Well-Healthy Cooking Secrets

A healthy eating plan doesn't mean you have to sacrifice your favorite foods or give up flavor. All that's needed is a little adjustment, an open mind, and an experimental spirit. Try some of these tips when preparing your favorite home-cooked meals

发表于:2019-02-07 / 阅读(133) / 评论(0)

阅读空间

英语冠军单曲：你是我的唯一 Tinchy Stryder - Number 1

冠军单曲：你是我的唯一 Tinchy Stryder - Number 1 在新一期的英国单曲榜中，有加纳血统的东伦敦歌手Tinchy Stryder收获了他的第一首冠军单曲，他与伦敦Hip-Hop组合N-Dubz合作的单曲《Number 1》歌如其名

发表于:2019-02-13 / 阅读(150) / 评论(0)

流行英文歌曲

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