氟化钛(III) {三氟化钛}

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(107) / 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(79) / 评论(0)

科技之光

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(107) / 评论(0)

口腔临床英语对话

英语课程计划-Indigenous People

August the 9th is International Day of the World's Indigenous People. It is a time for the world to understand the problems of indigenous peoples around the world. The day was created by the United Nations General Assembly in 1994. It wanted to stren

发表于:2018-12-29 / 阅读(91) / 评论(0)

英语课程学习计划和讲义

2006年VOA标准英语-Indigenous Returns With "Chasing The Sun"

By Doug Levine Washington 15 July 2006 Every now and then a young guitar player comes along with the promise of being the next Eric Clapton or Jimi Hendrix. The arrival of Native American guitarist Mato Nanji may mean the wait for a new rock superst

发表于:2019-01-07 / 阅读(161) / 评论(0)

2006年VOA标准英语（七月）

VOA标准英语2009年-Bangladesh Says Mutinous Guards Surrender

Bangladesh's government says all mutinous border guards have ended their rebellion. That word came after army tanks took positions outside the Dhaka headquarters of the border force. Some officials put the death toll from the two-day uprising at mor

发表于:2019-01-13 / 阅读(114) / 评论(0)

VOA标准英语2009年(二月)

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(86) / 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(80) / 评论(0)

2018年科学美国人1月

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(93) / 评论(0)

科技之光

2006年VOA标准英语-Recent Studies Show Multitasking May Hurt a Per

By Ernest Leong Washington, D.C. 14 August 2006 watch Multitasking report It's a busy, fast moving world many of us live in, one that frequently requires us to multitask -- perform several tasks simultaneously. Some scientists say multitasking may n

发表于:2019-01-31 / 阅读(96) / 评论(0)

2006年VOA标准英语（八月）

2007年VOA标准英语-Mali's Indigenous Dogon Tribe Struggles With 21

By Naomi Schwarz Dogon Country 04 January 2007 In this arid area near the eastern edge of Mali near the Burkina Faso border, the indigenous Dogon people struggle to maintain their culture and traditional ways of life since the end of the colonial er

发表于:2019-02-01 / 阅读(151) / 评论(0)

2007年VOA标准英语（一月）

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(80) / 评论(0)

英语单词荟萃

2006年VOA标准英语-UN Indigenous Chief Urges Kenya To Protect Indi

By Cathy Majtenyi Nairobi 11 December 2006 A senior U.N. official concerned with the plight of indigenous communities around the world is in Kenya to assess the situation of pastoralist, hunter-gatherer, and other indigenous communities in the East

发表于:2019-02-07 / 阅读(137) / 评论(0)

2006年VOA标准英语（十二月）

最新学习文章

热门学习文章

热门标签

英语听力 VOA标准英语 VOA 英语歌曲口语听力提高听力材料听力教程英语学习 NPR 英语口语 VOA慢速英语美国国家电台儿童英语 VOA英语小学英语 cnn VOA常速英语标准英语英文歌曲听电影学英语英语单词英文电影慢速英语 CRI 美联社新闻美国有线新闻加州分级澳洲新闻流行歌曲常速英语 ABC新闻快递疯狂英语英语读物听力棚车少年经济学人英语词汇商务英语 VOA双语新闻 BBC 中国电台大学英语 Treasures 加州语文 BBC英语英语听力网站 VOA英语教学词汇万花筒 SSS VOA英语听力 AP 新概念分级英语英语广播听力精选英语播客英文绘本 TED演讲赖世雄英语MP3 CCTV9英语新闻 lesson 英语新闻初中英语学英语英语语法历史上的今天英文广播剧英语游戏原版英语小说英语有声读物书虫英语牛津英语读物访谈录新闻一分钟考研英语英语每日在线听新闻 Us 新概念英语地道英语单词第二册自然百科高中英语 sports 实用英语 MP3听力辛沛沛 ESL英语第一册英语每日一句 unit 新东方 GRE 每日一词 BBC听力

学英语单词

capacitive pressure sensor

case-hardening furnace