单词：Tetroxyfluoride
单词：Tetroxyfluoride 相关文章
DAVID GREENE, HOST: All this year, we are looking at the events of 1968 that continue to shape our world today. It was 50 years ago this week when thousands of North Vietnamese troops and their Viet Cong allies launched an audacious attack sweeping i
2018年NPR美国国家公共电台1月
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
To pet owner Donna Hill, She is just as much a part of my family as any child is to another family. Kattle is her everything. You can't beat the unconditional love. The same from Roxy's owner Jeremy Bret. She's our baby. She is cute but expensive. Th
万花筒2009年
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]Module 6 FAMILY(1) [00:06.40]UNIT 2 Meet my family. [00:09.94]1 Listen and read.Then say. [00:14.56]Come and meet my family,Feifei. [00:17.98]This is my father. [00:20.24]Dad,this is Feifei. [00:22.30]It's nice to meet you,Mr Jones. [00:25.
外研社新标准初中英语七年级
Kattle you are gonna be famous. To pet owner Donna Hill, She is just as much a part of my family as any child is to another family. Kattle is her everything. You can't beat the unconditional love. The same from Roxy's owner Jeremy Bret. She's our bab
英语杂谈
Illinois Nightclub Caters to Mentally Challenged We in America no longer lock away people with mental illness or intellectual disabilities as routinely as we once did, unless their impairments are profound or theyre considered a danger to themselves
VOA标准英语2012年(一月)
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
WE ARE ON the front porch at Frank Martin's drying-out facility. Like the rest of us at Frank Martin's, J.P. is first and foremost a drunk. But he's also a chimney sweep. It's his first time here, and he's scared. I've been here once before. What's t
英文短篇小说
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