(四)氟化硅

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(242) / 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(188) / 评论(0)

科技之光

2015Billboard获奖歌曲：Meghan Trainor —《All About That Bass》

《All About That Bass》是由美国女歌手梅根特瑞娜演唱的歌曲，于2014年6月30日发行，收录于梅根特瑞娜2014年发行的EP专辑《Title》及2015年发行的录音室专辑《Title》中，作为专辑的首支单曲发行。

发表于:2018-12-13 / 阅读(166) / 评论(0)

音乐天堂

最新英文歌曲精选：All About that Bass – Meghan Trainor

All About That Bass - Meghan Trainor Because you know 因为你懂的 I'm all about that bass, 我犹如那重低音贝司 'Bout that bass 超重低音 no treble 不失真 I'm all 'bout that bass, 我犹如那重低音贝司 'bout that bass, no trebl

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2015最新精选英文歌曲

英文歌曲：All About That Bass - Meghan Trainor

发表于:2018-12-14 / 阅读(156) / 评论(0)

金属

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(211) / 评论(0)

口腔临床英语对话

越狱第一季:第四十三期

[00:42.27]T-Bag [00:48.16]D.B.Cooper [00:50.36]D.B. [01:06.58]T-Bag [01:12.17]Oh, is that who you is now? [01:13.37]I thought you was just a cowboy. [01:16.37]Take a couple of steps back, boy. [01:18.05]You know, what I can't understand [01:19.15]is

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越狱第一季

2006年VOA标准英语-US Government Approves Use of Silicone Breast I

By Carol Pearson Washington, DC 21 November 2006 watch Breast Implants report The U.S. Food and Drug Administration (FDA) has lifted its 11-year ban on silicone implants. But the decision is not without controversy. Silicone and saline implants The

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2006年VOA标准英语（十一月)

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

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(188) / 评论(0)

英语单词荟萃

影视歌曲：Meghan Trainor-All About That Bass

Because you know 因为你懂的 I'm all about that bass, 我犹如那重低音贝司 'Bout that bass 超重低音 no treble 不失真 I'm all 'bout that bass, 我犹如那重低音贝司 'bout that bass, no treble 超重低音不失真 I'm all 'bou

发表于:2019-02-11 / 阅读(195) / 评论(0)

英乐时空

英语听力精选进阶版 6321

It is 50 years since the first breast enlargement using silicone implants. Today it rates as the second-most popular form of cosmetic surgery worldwide, undergone by 1.5 million women in 2010. It is just behind liposuction in popularity. It was sprin

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