氟化锇(VI) {六氟化锇}

George VI Delivers His Final Christmas Address to the Britis

As I speak to you today I would like to wish you, wherever you may be, a Happy Christmas. And though we live in hard and 1) critical times, Christmas is and always will be a time when we can 2) count

发表于:2018-11-28 / 阅读(215) / 评论(0)

疯狂英语2002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(172) / 评论(0)

Scientific American(十二)月

求职英语二interview_vi-xii_new

[00:00.00]VI Education Status 3 [00:02.17]六、教育状况（3） [00:04.34]Model Sentences [00:05.49]典型例句 [00:06.64]What kind of activities were you involved in? [00:08.63]你曾经参加过哪些课外活动？ [00:10.63]Were you in a lea

发表于:2018-12-05 / 阅读(220) / 评论(0)

求职英语

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(134) / 评论(0)

科技之光

初中一年级英语(牛津深圳版)下册 Chapter 2 Protecting our envi

发表于:2018-12-10 / 阅读(190) / 评论(0)

初中一年级英语

The Holiday review

Callum: Hello, I'm Callum Robertson and this is Entertainment. In the Christmas and New Year season there are always a number of films released set in this time of year which use images of traditional Christmas and winter scenery, like cottages in c

发表于:2018-12-19 / 阅读(127) / 评论(0)

Entertainment

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(163) / 评论(0)

口腔临床英语对话

THIS IS AMERICA - In the United States, Some Companies Provi

THIS IS AMERICA - In the United States, Some Companies Provide After-School Programs for Children of Employees By Cynthia Kirk Broadcast: Monday, April 04, 2005 (MUSIC) VOICE ONE: Welcome to This is A

发表于:2019-01-08 / 阅读(178) / 评论(0)

This is America

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(146) / 评论(0)

VOA标准英语2010年(十)月

Individuals in the news

BBC Learning English Weekender Individuals in the news Callum:Hello, I'm Callum Robertson. When you look around the news websites today or read newspapers there are many global stories. Often these stories are about conflict, disaster and tragedy an

发表于:2019-01-16 / 阅读(421) / 评论(0)

Weekender

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(139) / 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(140) / 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(133) / 评论(0)

英语单词荟萃

Improving Productivity by Improving Lighting

Improving Productivity by Improving Lighting We all know that our surroundings affect our ability to get work done, from that irritating buzzing from the next cubicle over to the uncomfortable chair causing our back pain. But what about lighting? Has

发表于:2019-02-04 / 阅读(181) / 评论(0)

阅读空间

The Productivity Tricks and Daily Habits of Famous People

The Productivity Tricks and Daily Habits of Famous People Famous visionaries often develop a reputation for having a few eccentricities. However, for many people, these small eccentricities are part of a larger group of daily rituals that help them t

发表于:2019-02-04 / 阅读(162) / 评论(0)

阅读空间

Vik Muniz:用电线和糖创作艺术

Vik Muniz 能够用任何东西进行艺术创作，如粉碎的纸张，电线，云彩或钻石。在此他描述了这些作品背后的思路，带给我们一次不可思议的图像之旅。

发表于:2019-02-05 / 阅读(154) / 评论(0)

TED公开课:艺术与幻觉

2000年春季高考英语—第二卷VI

VI. 书面表达（满分30分）为了丰富外国留学生的生活,你校学生会将举办一次音乐周活动。请你以组织者的身份写一个书面通知书。有关内容如下: 时间:

发表于:2019-02-06 / 阅读(238) / 评论(0)

实用英语

英文流行歌曲：手风琴伴奏清爽舞曲：Vika Jigulina - Stereo Love

手风琴伴奏清爽舞曲：Vika Jigulina - Stereo Love 罗马尼亚女歌手Vika Jigulina的新舞曲Stereo Love首发即冲进英国单曲榜前十，目前位居第四。快节奏的欧陆舞曲融合了风格独特的手风琴伴奏，效果是出

发表于:2019-02-11 / 阅读(155) / 评论(0)

经典英文歌曲

巧思妙解记忆英语六级词汇VI

单词的记忆将不在是一件困难和痛苦的事情, 你会发现你的单词量在一段时间内暴涨,一种强烈的满足感油然而生,另外, 背单词的时候不要只见树木不见森林, 比如说, 你知道了词根liter表示文字

发表于:2019-02-19 / 阅读(158) / 评论(0)

大学四六级阅读

英文摇滚歌曲：Killswitch Engage - Vide infra

I have opened my eyes to see the world the surrounds me daily I refuse to be led by the majority Can't compromise I and I To pass judgment Judgment will be passed upon you I will stand up for who I am Never moved by condemnation No one is placed high

发表于:2019-03-02 / 阅读(157) / 评论(0)

英文摇滚歌曲

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blackjack (sphalerite)

blowtorch