聚偏二氟乙烯纤维

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(148) / 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(113) / 评论(0)

科技之光

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2059 、铸模；模子 mould 2060 、铸模成形；倒模成形；模塑 moulding 2061 、铸钢；生钢 caststeel 2062 、铸铁；生铁 castiron 2063 、廿三画 2064 、纤维 fibre 2065

发表于:2018-12-08 / 阅读(108) / 评论(0)

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UNIT 4 Stay Healthy Lesson 27 Good Food, Good health

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发表于:2018-12-10 / 阅读(135) / 评论(0)

河北教育初中英语（初中起点）九年级上

高中英语人教版必修3 02

[00:04.28]Reading COME AND EAT HEAR(1) [00:09.12]Wang Pengwei sat in his empty restaurant feelling very frustrated. [00:15.05]It had been a very strange morning. [00:17.92]Usually he got up early prepared his menu of mutton kebabs, [00:23.28]roast po

发表于:2018-12-13 / 阅读(221) / 评论(0)

高中英语人教版必修

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(138) / 评论(0)

口腔临床英语对话

高中英语人教版高一下13

[00:07.39]Lesson 57 1.Dialogue [00:12.54]AT THE DOCTOR'S [00:15.78]Sharon is visiting a doctor,Dr Yang. [00:21.03]What can I do for you,sharon? [00:24.58]Well,I couldn't sleep last night. [00:29.15]What was the matter? [00:31.90]I've got a pain here.

发表于:2019-01-10 / 阅读(284) / 评论(0)

高中英语人教版高一

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(119) / 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(118) / 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(122) / 评论(0)

科技之光

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发表于:2019-01-31 / 阅读(101) / 评论(0)

英文语法词汇

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(115) / 评论(0)

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招标、投标和广告

INVITATION FOR BIDS, BID AND ADVERTISEMENTS 招标、投标和广告 Introduction Bidding is another form of trading in international business. When enterprises, utilities as well as governments are in need of certain materials, products or planning

发表于:2019-02-04 / 阅读(116) / 评论(0)

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过去将来一般时的基本概念和形式过去将来一般时(future-in-the-past indefinite tense)表示对于过去某一时间而言将要发生的动作或存在的状态。过去将来一般时由should(第一人称)或would(第二、三人称

发表于:2019-02-08 / 阅读(133) / 评论(0)

实用英语

2018年CRI Tibet to have universal fibre-optical broadband service

China's Tibet Autonomous Region is about to achieve a universal coverage of fibre-optical broadband service ahead of its schedule. As China further rolled out its universal broadband project, Tibet's broadband service is looking to reach 98% of admin

发表于:2019-02-14 / 阅读(167) / 评论(0)

2018CRI中国国际广播电台

夏说英语新闻晨读第446期:快时尚与环保

本期内容： Young people's love of fast fashion is coming under the scrutiny of Britain's law-makers. MPs say the fashion industry is a major source of the greenhouse gases that are overheating the planet. Discarded clothes are also piling up in

发表于:2019-02-20 / 阅读(99) / 评论(0)

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经济学人275:电梯和摩天大楼另一个高耸入云的俱乐部

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发表于:2019-02-24 / 阅读(137) / 评论(0)

经济学人科技系列

新西兰英语 446 Wool Week

Wool Week opened early yesterday morning in Wellington with a display of sheep shearing at the railway station. Then children brought in their pet lambs. People on their way to work stopped to watch. Then there was a fashion parade of woolen clothes

发表于:2019-02-25 / 阅读(118) / 评论(0)

新西兰英语

聆听悦耳英音第14期:Polyester Birthday(2)

嘉宾：Debbie Mason 话题：的确良，的确很时尚！Polyester Birthday 单词拼写： 1、faculty 系，院 2、petrochemical 石化 3、fibre 纤维 4、textiles 纺织品 5、components 组件重点俚语： derived from 起源，从得来

发表于:2019-02-26 / 阅读(291) / 评论(0)

聆听悦耳英音

聆听悦耳英音第13期:Polyester Birthday(1)

嘉宾：Debbie Mason 话题：的确良，的确很时尚！Polyester Birthday 单词拼写： 1、polyester 涤纶（的确良） 2、chemist 化学家 3、synthetic fibre: man-made，artifical fibre 人造纤维 4、fiesta 嘉年华 5、subtle 不明

发表于:2019-02-26 / 阅读(157) / 评论(0)

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