硅氟化铯 {氟硅酸铯}

CCTV9英语新闻：Prosecutors seek warrants to examine assets of those close to Choi Soon-sil

Prosecutors in South Korea are seeking warrants to examine the assets of those close to Choi Soon-sil, the woman at the center of the country's snowballing political scandal and the confidante of impeached President Park Geun-hye. Around 40 people ha

发表于:2018-11-27 / 阅读(456) / 评论(0)

cctv9英语新闻2017年

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(155) / 评论(0)

Scientific American(十二)月

14 A Rare Fossil Record

14 A Rare Fossil Record The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had a

发表于:2018-12-07 / 阅读(453) / 评论(0)

英语范文背诵20篇

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(119) / 评论(0)

科技之光

新东方现代文背诵篇章 A Rare Fossil Record

The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be foss

发表于:2018-12-15 / 阅读(224) / 评论(0)

新东方现代文背诵篇章

彭蒙惠英语：Spreading the World… Silbo Style

Spreading the World… Silbo Style By Susan Zimmerman Discovering an ancient whistling language on a tropical Atlantic island 1 All eyes and ears are upon teacher Isidro Mendoza when he enters the cla

发表于:2018-12-19 / 阅读(113) / 评论(0)

彭蒙惠英语

美国英语听力80篇3 Lesson58

[00:06.37]The United States has a new official clock. [00:10.95]The clock began operating late last year in the American city of Boulder,Colorado. [00:18.39]Experts say the new clock is so exact that it will neither gain nor lose so much as one secon

发表于:2018-12-26 / 阅读(92) / 评论(0)

美国英语听力80篇

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(143) / 评论(0)

口腔临床英语对话

SSS 2009-08-12

Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol

发表于:2019-01-08 / 阅读(107) / 评论(0)

Scientific American(八)月

五人英语话剧剧本-The Silber Swindle

5人 Actors: Tavern Keepe:(男主角) Young Man Keeper's Wife(女主角) Young Man Old Man Summary: Once upon a time, there was a tavern. Travelers and hunters would exchange silver ingots for copper coins and eat some food there. The tavern keeper a

发表于:2019-01-08 / 阅读(197) / 评论(0)

英文剧本

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(124) / 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(128) / 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(127) / 评论(0)

科技之光

VOA常速英语2007年-Glittering Soccer World Cup Draw Aims to Silenc

By Scott Bobb Johannesburg 26 November 2007 Organizers of the 2010 soccer World Cup in South Africa are calling Sunday's preliminary draw in the southern city of Durban a success. They say they hope it will put an end to doubts about the African nat

发表于:2019-01-31 / 阅读(112) / 评论(0)

VOA常速英语2007年（十一月）

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(119) / 评论(0)

英语单词荟萃

Uma Gunasilan

BBC Learning English People and Places Sun Hai Nin SIG Sun Hai Nin: Well, hello everybody Im Hai Nin, Im from China and now Im in London. William:And Im William Kremer welcome to People and Places. You just heard a young Chinese Woman, Sun Hai Nin.

发表于:2019-02-03 / 阅读(390) / 评论(0)

人与地方

音乐咖啡厅:Be Still My Heart-Silje Nergaard

极素白极纯净，没有一点尘埃，仿佛天堂的所在。这样美好无暇的颜色却让人刺痛得张不开眼。在这白晃晃的空间里，Silje对着镜头睁大她那毫无表情的瞳孔，低吟浅唱，旁若无人。我们还是需要一点杂质的，这和我们无法呼吸百分之百的纯氧是一个道理。 My heart's not lonel

发表于:2019-02-04 / 阅读(232) / 评论(0)

音乐咖啡厅

经济学人:自由交流:疯狂，恐慌和ICO(1)

Finance and Economics 财经 Free exchange: Manias, panics and ICOs 自由交流：疯狂，恐慌和ICO Crypto-coin mania illustrates the crazy and not-so-crazy sides of bubbles. 加密货币狂热诠释了泡沫的疯狂一面和不那么疯狂的一

发表于:2019-02-17 / 阅读(161) / 评论(0)

经济学人财经系列

Mexico has best Olympics in over 40 years

LONDON, Aug. 12 (Xinhua) -- The Mexican delegation for London 2012 Olympic Games had its best performance in over 40 years in the summer games, winning seven medals, including one golden, three silver and three bronze. It is the second best Olympics

发表于:2019-02-18 / 阅读(127) / 评论(0)

英语新闻

Mexico to send 102 athletes to London Olympics

MEXICO CITY, July 12 (Xinhua) -- Mexico will go to London 2012 Olympic Games with a 102-athlete delegation together with 109 people including officials, coaches and doctors, Mexican sports authorities said Thursday. Jaime Cadaval, chief of the Mexica

发表于:2019-02-19 / 阅读(118) / 评论(0)

英语新闻

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argillaceous sandstone

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