四氧氟化物

美国国家公共电台 NPR Military Victory But Political Defeat: The Tet Offensive 50 Years Later

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

发表于:2018-12-02 / 阅读(203) / 评论(0)

2018年NPR美国国家公共电台1月

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(193) / 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(146) / 评论(0)

科技之光

万花筒 2009-11-03&11-05 养宠物少交税

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

发表于:2018-12-11 / 阅读(121) / 评论(0)

万花筒2009年

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(180) / 评论(0)

口腔临床英语对话

新标准初中英语七年级:UNIT2 Meet my family

[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.

发表于:2018-12-29 / 阅读(162) / 评论(0)

外研社新标准初中英语七年级

英语杂谈：47 Pet Tax Deduction

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

发表于:2019-01-09 / 阅读(137) / 评论(0)

英语杂谈

VOA标准英语2012--Illinois Nightclub Caters to Mentally Challenged

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

发表于:2019-01-13 / 阅读(153) / 评论(0)

VOA标准英语2012年(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

发表于:2019-01-14 / 阅读(161) / 评论(0)

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

发表于:2019-01-20 / 阅读(150) / 评论(0)

2018年科学美国人1月

【英文短篇小说】WHERE I'M CALLING FROM（1）

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

发表于:2019-01-23 / 阅读(135) / 评论(0)

英文短篇小说

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

发表于:2019-01-30 / 阅读(154) / 评论(0)

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(146) / 评论(0)

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