单词：cypric fluoride
单词：cypric fluoride 相关文章
Key Words [00:00.78]关键词 [00:01.57]The Most Common Expressions [00:02.82]最常用表达法 [00:04.08]Incredible!It's said that someone has encountered a dinosaur in a primeval forest. [00:12.88]真难以置信！据说有人在原始森林里见到
零距离李阳疯狂英语口语
INTRODUCTION TO ACT I Today on TUNING IN THE U.S.A., we are in the Stewart home. Ellen is playing the piano when Philip enters the room. He has found an old horn in an upstairs closet. It was a wedding present many years ago. Tomorrow is the annivers
欢乐美语
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
Scientific American(十二)月
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
科技之光
Prisma App Makes Art Out of Photos Pokmon GO is the most popular app in the world right now. But another new app is also getting a lot of attention. And its free. Prisma lets users add filters to photos to interesting, beautiful and strange effect. T
2016年VOA慢速英语(七)月
Outdoor of activities A picnic in Spring It is warm. We will picnic in mountain of Yangming. There are many birds chipping around in Spring. It's really enjoyable to lie on the grass and appreciate the beauty of nature.
学术英语视频-教育
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
口腔临床英语对话
[00:00.00]After several nights,Nian finally ran back [00:04.14]into the mountains and was never seen again. [00:07.70]That winter,the people celebrated [00:10.06]with special food,dancing and singing. [00:14.04]That is why the Chinese Spring Festival
外研社新标准初中英语八年级
The itsy bitsy spider climed up the water spout. Down came the rain, and washed the spider out. Up came the sun, and dried up all the rain, And the itsy bitsy spider went up the spout again.
鹅妈妈童谣
Springtime in D.C. From VOA Learning English, welcome to THIS IS AMERICA. Im Kelly Jean Kelly. And Im Bob Doughty. It is here at last: the Washington D.C. spring, when Americas capital bursts into color. We can ride a bus, a bicycle, a Segway, a hors
2013年VOA慢速英语(五)月
By Peter Fedynsky Washington, D.C. 19 February 2007 watch Appropriations report On the same day that the U.S. House expressed its disapproval of sending more troops to Iraq, the White House asked lawmakers to approve additional money for Iraq's econ
2007年VOA标准英语（二月）
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
VOA标准英语2010年(六)月
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
VOA标准英语2010年(十)月
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
2018年科学美国人1月
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
科技之光
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
英语单词荟萃
South Africa's former police chief and ex-president of Interpol Jackie Selebi looks on during a hearing at the High Court of Johannesburg, on 3 Aug 2010 The former head of South Africa's national police force and former president of Interpol has been
VOA标准英语2010年(八)月
Chinese New Year starts with the New Moon（新月）on the first day of the new year and ends on the full moon（满月）15 days later. The 15th day of the new year is called the Lantern Festival（元宵节）, which is celebrated at night with la
阅读空间
Spring cleaning 大扫除 Kate: Hello, Im Kate Colin and this is 6 minute English and today I'm joined as usual by Jackie Dalton. Well now we're well into the month of May and spring is well under way so today were talking about the modern attitude to
六分钟英语
饶舌:Brokencyde - Get Crunk 相关介绍 ：你听过Crunk加 Screamo的么?强力推荐,强烈的hipa节奏+上scream.强的没话说,第2首Bree!听着像猪叫...哈哈fans别骂我,太喜欢这种个性的音乐了 歌词 ： Song ：Get Crunk
节奏布鲁斯