[机] 聚偏二氟乙烯

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(187) / 评论(0)

Scientific American(十二)月

[单词解析速记].JV447.(Yoke.and.Vapid)

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! Thank you！

发表于:2018-12-04 / 阅读(158) / 评论(0)

单词解析速记

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(141) / 评论(0)

科技之光

常春藤解析英语【62】Five Minutes to Midnight

Five Minutes to Midnight 滴！答！滴！毁灭倒数计时 by Kevin Lustig The University of Chicago publishes the Bulletin of the Atomic Scientists, a magazine about topics related to nuclear technology. On the cover of every issue of the magazin

发表于:2018-12-08 / 阅读(145) / 评论(0)

常春藤解析英语

It's Not Easy Being a Kid!

It's Not Easy Being a Kid!－儿童英语故事三

发表于:2018-12-14 / 阅读(161) / 评论(0)

儿童英语故事三

【英语时差8,16】回收塑料

Recycling Plastics When plastic containers are recycled, they are first cleaned, then ground into tiny pellets and put into a flotation tank. This separates out the various plastic resins from other waste material. Once they are separated out, the pl

发表于:2018-12-27 / 阅读(140) / 评论(0)

英语时差8，16

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(175) / 评论(0)

口腔临床英语对话

【一起闲话英语】去取身份证—Getting an ID card

Transcript: Admin worker: International Student ID card? Student: Yes, thats right. Admin worker: Have you got the form? Student: Yes, here it is. Admin worker: OK, lets see. Name Ahmed, surname Saeed, age 14, address ... (pause) ... oh, whats your a

发表于:2018-12-28 / 阅读(150) / 评论(0)

一起闲话英语-English Chitchat

[单词解析速记].JV517.(Vivid.and.Inane)

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单词解析速记

[单词解析速记].JV542.(Penchant.and.Intrepid)

发表于:2018-12-30 / 阅读(184) / 评论(0)

单词解析速记

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(159) / 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

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2018年科学美国人1月

英语语法：42 Did I Tweet or Did I Twitter?

Grammar Girl here. Today I have exciting language news from the new 2009 AP Stylebook. Last week the Associated Press released the updated 2009 edition of its famous AP Stylebook. This is the language rule book used by all the journalists in the Asso

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英语语法 Grammar Girl

the Perseid meteor shower

77 流星雨成因探索 Date=8-2-01 Ttle=science report - the Perseid meteor shower Bline=Mario Ritter （Start at 59

发表于:2019-01-30 / 阅读(145) / 评论(0)

科技之光

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(149) / 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

A Midshipman

One of my fellow midshipmen at the U. S. Naval Academy was performing poorly in class and reported to his company officer for counseling., Your marks are deplorable! the officer scolded. Is there a problem-that has kept you from studies?No, sir, the

发表于:2019-02-03 / 阅读(164) / 评论(0)

趣味英语

China reviews anti-dumping measures on Japanese chloroprene rubber

BEIJING, Aug. 8 (Xinhua) -- China on Wednesday started to review anti-dumping measures it imposed on chloroprene rubber imported from a Japanese company, the Ministry of Commerce said. The move came after the ministry received complaints that Japan E

发表于:2019-02-05 / 阅读(217) / 评论(0)

英语新闻

China's new Internet ID policy triggers online discussion

BEIJING, Jan. 3 (Xinhua) -- A policy that requires users to use their real names when registering for Internet access has triggered heated discussion, with some for and some against it. On Dec. 28, China's top legislature passed rules on protecting o

发表于:2019-02-08 / 阅读(197) / 评论(0)

英语新闻

10 Benefits of Rising Early, and How to Do It

10 Benefits of Rising Early, and How to Do It Recently, reader Rob asked me about my habit of waking at 4:30 a.m. each day, and asked me to write about the health benefits of rising early, which I thought was an excellent question. Unfortunately, the

发表于:2019-02-18 / 阅读(327) / 评论(0)

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Belloc, (Joseph)Hilaire (Pierre)

calcium citrate