氟化物辉发性

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(122) / 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(89) / 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(119) / 评论(0)

口腔临床英语对话

2006年VOA标准英语-Volatility Seen in Precious Metals Market

By George Dwyer Washington, DC 29 May 2006 watch Gold Prices report Last week the price of gold on the New York Mercantile Exchange declined by 7 and a half percent, the most since 1990. By Wednesday of this week it was down again: 13 percent off fr

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2006年VOA标准英语（五月）

VOA慢速英语2011--Debt, Recession Worries Bring Volatility

Economics Report - Debt, Recession Worries Bring Volatility to World Markets 经济报道 - 债务和衰退担忧给全球市场带来震荡 This is the VOA Special English Economics Report. 这里是美国之音慢速英语经济报道。 A rollerco

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2011年VOA慢速英语(八)月

VOA标准英语10月-More Volatility on Wall Street as Stocks Close Sh

Financial markets continue to exhibit extreme volatility as investors assess the impact of government intervention in both the U.S. and European banking sectors. VOA's Barry Wood has more. Wall Street trader, 16 Oct 2008 This time stocks ended highe

发表于:2019-01-13 / 阅读(77) / 评论(0)

VOA标准英语2008年（十月）

VOA标准英语2012--World Bank Urges Developing Countries to Brace for Long Term Volatility

World Bank Urges Developing Countries to Brace for Long Term Volatility Emerging market economies may have weathered the 2008 financial crisis better than more advanced countries, but the World Bank warns -- it could happen again. Senior bank economi

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VOA标准英语2012年(六月)

VOA标准英语2011--'My Week with Marilyn' Captures Icon's Volatility

'My Week with Marilyn' Captures Icon's Volatility In the summer of 1956, Hollywood legend Marilyn Monroe joined the equally iconic British actor, Laurence Olivier, to film The Prince and the Showgirl in London. My Week with Marilyn is based on Colin

发表于:2019-01-13 / 阅读(68) / 评论(0)

VOA标准英语2011年(十一月)

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(103) / 评论(0)

VOA标准英语2010年(十)月

VOA标准英语2014--Bakken Crude Volatility, Rail Safety Scrutinized in Northern US

Bakken Crude Volatility, Rail Safety Scrutinized in Northern US WILLISTON, NORTH DAKOTA The U.S. department of transportation recently issued an emergency order requiring shippers of Bakken oil to ensure that the substance is properly classified prio

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VOA标准英语2014年(六月)

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

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2018年科学美国人1月

经济学人95:外汇市场固定汇率

The foreign-exchange market外汇市场Fixed rates固定汇率The money-spinners await their fate货币投机者只能等待赚钱的时机A CITY worker looking for a quiet place to nap nowadays could do worse than head for his bank's foreign-exchang

发表于:2019-01-27 / 阅读(110) / 评论(0)

经济学人财经系列

PBS高端访问:华尔街股市上涨的背后是什么?

HARI SREENIVASAN: Stock prices just keep going up and up. The Dow Jones Industrial Average closed at a record high yesterday, and so did a closely watched broader index, the Samp;P 500. To help explain what's behind the latest surge on Wall Street, w

发表于:2019-01-27 / 阅读(70) / 评论(0)

PBS访谈商业系列

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(104) / 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(96) / 评论(0)

英语单词荟萃

生猪价格创历史新高

Less demand for pork after the festive season of China's traditional Lunar New Year usually causes a price dip, but this year the market has seen an unexpected surge in hog prices. Statistics show that the hog price is nearly 20 yuan per kilogram, a

发表于:2019-02-04 / 阅读(56) / 评论(0)

英语新闻

A股遭遇一个月来最大单日跌幅

Chinese shares posted their biggest one-day fall in a month yesterday, with indices closing more than 6 per cent lower after a late sell-off. 中国股市昨天出现一个月来最大单日跌幅，在尾盘抛售之后，沪深股指收跌逾6%。

发表于:2019-02-06 / 阅读(128) / 评论(0)

英语新闻

学个词 Learn a Word-VOA英语教学 2367 volatility

今天我们要学的词是 volatility. Volatility 名词，意思是波动性。Analysts are warning of further market volatility following a roller-coaster ride last week. 经过上周一周的起伏跌荡，分析人士警告说，市场波动还会

发表于:2019-02-08 / 阅读(62) / 评论(0)

英语单词荟萃

粮农组织呼吁实现粮食安全

ROME, Dec. 9 (Xinhua) -- The Rome-based United Nations Food and Agriculture Organization (FAO) published the State of Agricultural Commodity Markets (SOCO) 2015-2016 on Wednesday, calling for a pragmatic approach that would align agricultural and tra

发表于:2019-02-16 / 阅读(66) / 评论(0)

英语新闻

经济学人:投资者:谨慎责无旁贷(2)

Nothing makes individuals more willing to take risks than the sight of other people getting rich. 没有什么能比眼看着别人发财致富而让个人更愿意承担风险了。 But bitcoin is also different from ICOs. 但是，比特币也不同于

发表于:2019-02-17 / 阅读(105) / 评论(0)

经济学人财经系列

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