[化] 氟化三茂镎

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

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英语口语1+1:A wolf in sheep's clothing

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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

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圣诞节快到了，听厌了Jingle Bell吗？就让Jenny和Connor来为大家推荐一些不一样的歌吧。这些都是欧美正当流行的热门圣诞歌曲哦！圣诞歌曲英语怎么说？圣诞歌曲除了Christmas songs，还可以说：

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美国文化脱口秀

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

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口腔临床英语对话

双语有声阅读:Cloze: Stingers of the Sea 海中“刺”客

Cloze: Stingers of the Sea 海中刺客 ── 水母 Given impressive-sounding names like Portuguese man-of-war, jellyfish are certainly respected and feared by humans. Not exactly a fish, and lacking a spine, this creature has a single body cavity

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双语有声阅读

最新英文歌曲精选：Mary, Did You Know? – Pentatonix

Mary, Did You Know? - Pentatonix Mary did you know take your baby boy 玛丽你知道吗你的圣子 Would one day walk on water 有一天会在水上行走 Mary did you know that your baby boy 玛丽你知道吗你的圣子 Would save our sons and d

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2015最新精选英文歌曲

2007年VOA标准英语-Emergency Relief Goods on Display at Aid & Trad

By Lisa Schlein Geneva 01 February 2007 Getting essential relief supplies to victims of natural disasters and conflict is critical for their survival. These emergency goods do not just magically appear out of the air. They have to be purchased. A wid

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2007年VOA标准英语（二月）

VOA标准英语2012--Emergency Aid Being Sent to Stranded Chadians

Emergency Aid Being Sent to Stranded Chadians Emergency aid is being sent this week to about one thousand people mostly children stranded in a remote area of Chad. The International Organization for Migration says the Chadians fled violence in neighb

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VOA标准英语2012年(三月)

VOA标准英语2010年-Iconic Cyclo Disappearing From Phnom P

Oum Sok began working as a cyclo driver when he was 18. He says the city has become very expensive over the years, making it much harder to earn a living. New York has its yellow cab. London has its red bus. But Phnom Penh has its cyclo - a three-whe

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VOA标准英语2010年(六)月

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The State Department said Thursday an agreement for the start of direct peace talks between Israel and the Palestinians is close to completion. The deal will apparently be sealed by statements from the United States and the International Middle East

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VOA标准英语2010年(八)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

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So awesome, right? Another example is Pentair. Pentair is a U.S. industrial conglomerate. 很棒，对吧？另一个例子是滨特尔。滨特尔是美国的工业集团。 And about a decade ago,they sold their core power tools business and reinve

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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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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

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They might look like something out of a James Bond movie but these luxury underwater houses - the first of their kind in the world - are set to be built in Dubai. 它们可能看上去像是从詹姆斯邦德电影里直接穿越到三次元的，但是

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用数学知识强化记忆 fourscore = four(4)score(20) 80 美国第16任总统林肯演说词第一句：fourscore and seven years ago，那么，怎样才能记住 fourscore 这个词而终生不忘呢？只要我们了解了fourscore 的逻辑思维

发表于:2019-02-21 / 阅读(155) / 评论(0)

实用英语

好听英文歌：I Need Your Love —— Pentatonix

【大森】美国sing-off冠军Pentatonix最新纯人声超赞翻唱Calvin Harris和绵羊音Ellie Goulding热单《I Need Your Love》。人声合唱搭配五彩缤纷的mv剪辑，让人眼前眼花缭乱的同时身体也不禁随着节拍舞动起

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