单词:ammonium hyrogen fluoride
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DAVID GREENE, HOST: In 2003, an obscure, independent film called The Room opened in movie theaters here in LA. It was intended to be a serious melodrama about friendship, love, betrayal. Instead, it was shockingly bad - a baffling storyline, uncomfor
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
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?
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
In business, Optus has called for Telstra's proposals on its participation in the national broadband network to be blocked. Optus' chief executive Paul O'Sullivan says Telstra's current plan for the separation of its retail and wholesale arms wholesa
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
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
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
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
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
ROBERT SIEGEL, HOST: What is the worst movie you have ever seen? Well, many people might point to Tommy Wiseau's The Room, a romantic drama so ineptly made it has been called the Citizen Kane of bad movies. The Room has inspired a cult following, a v
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
Less than a week ago, Sony indicated that, under pressure of threats, the moviegoing public wasn't going to be able to see the comedy The Interview at a theater today. But that decision hit quickly on a trip wire of criticisms about geopolitics, free
By Melinda Smith Washington 04 April 2007 Many women who go through menopause experience the side effects of 'hot flashes', characterised by flushing or perspiration, or waking up in a sweat at night. For years, doctors recommended hormone therapy c
AGRICULTURE REPORT – March 12, 2002: Carbon Dioxide and Crops By George Grow This is the VOA Special English AGRICULTURE REPORT. Increasing levels of carbon dioxide gas in Earth’s atmosphere have
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
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
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
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
[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