氟化钇锂

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(191) / 评论(0)

Scientific American(十二)月

英语口语大赢家Topic94:买电器Purchasing Household Appliances

本杰明接到雪莉的电话，匆匆赶来家电商场，最终雪莉买了那款她钟情的微波炉了吗？ Listen Read Learn Benjamin: A microwave oven? Shirley: Yes, it's really two-pence colored. Benjamin: Okay, honey, we already have two. There is no more space for a third on

发表于:2018-12-03 / 阅读(139) / 评论(0)

王强口语第二册

【英语语言学习】双相型障碍

Hi, it's the All in the Mind podcast, I'm Lynne Malcolm. Today we go to Ireland to hear one man's story of living with bipolar disorder. Ian is in his mid-fifties, and despite his illness he has an enviable, almost idyllic life with his wife and thre

发表于:2018-12-04 / 阅读(163) / 评论(0)

听一分钟英文-I

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(144) / 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(178) / 评论(0)

口腔临床英语对话

【英语语言学习】滑板车“火”起来了吗

SCOTT SIMON, HOST: One of the hottest gifts of the season is a little too hot, hot enough to catch fire. Hoverboards have been burning up because of problems with their lithium-ion batteries. And lithium-ion batteries are in a lot of things these day

发表于:2018-12-28 / 阅读(140) / 评论(0)

英语语言学习

美国发明家的电池技术或改变世界

American inventor John Goodenough first started working on battery technology more than 40 years ago. Goodenough actually co-invented lithium-ion batteries in 1980. This eventually led to a revolution in the electronics industry because those devices

发表于:2019-01-02 / 阅读(152) / 评论(0)

2017年VOA慢速英语(五)月

VOA慢速英语--Demand for Lithium Creates ‘Water War’ in Chile

Parts of Chile are facing a growing water crisis. The Reuters news agency reports the government is taking steps to protect the countrys water supplies from mining operations. But for many years, the Chilean government approved water extraction right

发表于:2019-01-03 / 阅读(169) / 评论(0)

2018年VOA慢速英语(九)月

VOA慢速英语--科学家研发可永久循环使用电池

Batteries That Last Forever Could Be Near 科学家研发可永久循环使用电池 We all have daily problems with technology, but how many of us can fix them? Mya Le Thai is a scientist studying at the University of California, Irvine. She recentl

发表于:2019-01-12 / 阅读(147) / 评论(0)

2016年VOA慢速英语(五)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

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VOA标准英语2010年(十)月

英闻天下——409 Boeing: Dreamliner to Fly Again in Weeks

Aircraft maker Boeing says commercial flights of the grounded 787 Dreamliner jets could resume within weeks. We are going to be dependent upon, as we move through the certification process, to determine when we actually get back in the air in terms o

发表于:2019-01-19 / 阅读(114) / 评论(0)

英闻天下

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(149) / 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(152) / 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(145) / 评论(0)

英语单词荟萃

收购非洲最大铜矿中国长远布局钴供应

As China Molybdenum announced it was buying one of Africas largest copper mines earlier this month one thing was soon clear: the acquisition was about far more than the red metal. 随着洛阳钼业(China Molybdenum)本月早些时候宣布正在收购

发表于:2019-02-08 / 阅读(159) / 评论(0)

英语新闻

你应不应该整夜给手机充电?

Chances are, you plug in your phone before you go to bed at night, thinking it's best to greet the morning with a fully charged device. 晚上临睡前，你可能会给手机充上电，想着第二天早上看到一部电量满格的手机。 Is th

发表于:2019-02-13 / 阅读(193) / 评论(0)

英语新闻

环球英语 — 132： Bipolar Disorder

Voice 1 Hello. Im Rachel Hobson. Voice 2 And Im Mike Procter. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 3 I was in the tent

发表于:2019-02-14 / 阅读(157) / 评论(0)

环球英语 Spotlight

背单词运用地理学知识强化记忆

Ytterby 瑞典小镇伊特比 yttrium 钇 (1794) erbium 铒 (1842) terbium 铽 (1842) ytterium 镱 (1907) 1794年在瑞典小镇伊特比的黑石中发现了化学元素钇，决定用 Ytterby命名该元素：yttrium。1842 年在该镇的黑石中发

发表于:2019-02-18 / 阅读(125) / 评论(0)

实用英语

夏说英语新闻晨读第464期:弯道超车中国领跑电动汽车

本期内容： Europe gave the world some of its top automakers, but it's losing out to China in the race to define the industry's future. China is the driving force in the business of electric vehicle batteries, which European leaders see as vital

发表于:2019-03-01 / 阅读(164) / 评论(0)

夏说英语新闻晨读

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