氟化氙(II) {二氟化氙}

A Day at the Races (II)

American Old-time Radio Classic Favorites A Day at the Races (II) Mary: Hello, Benita! Benita: Hello, Mary. Hello, Jack. Why Ronnie, look who's here! Jack: Hello, Ronnie, aren't you surprised at meeti

发表于:2018-11-28 / 阅读(216) / 评论(0)

疯狂英语2004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

温馨夜读II PART1 13.You Are Not Alone

[00:01.19] 13.You Are Not Alone [00:04.90]Since I was 12 years old, Ive suffered with a condition called Compulsive Hair Pulling. [00:11.11]The physical devastation was severe, but the emotional damage was worse. [00:17.31]When I was young, no one, i

发表于:2018-12-03 / 阅读(145) / 评论(0)

自然百科2008年

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

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

托福听力短文 II-09-1

(MA) Look at our topographical map and you'll see that the middle third of the North American continent --- from the Rocky Mountains almost to the Mississippi River --- is pretty flat. This is the Great Plains. This kind of area is sometimes called

发表于:2018-12-30 / 阅读(106) / 评论(0)

托福听力短文

托福听力短文 II-08-2

(MA) Scientists are always on the lookout for alternative sources of energy. Today we're going to discuss one that's so plentiful they say it could supply more energy than all the coal and oil in the world. It's found in something called gas hydrate

发表于:2018-12-30 / 阅读(150) / 评论(0)

托福听力短文

托福听力短文 II-05-1

(WA) I was really glad when your club invited me to share my coin collection. It's been my passion since I collected my first Lincoln cent in 1971; that's the current penny with Abraham Lincoln's image. Just a little history before I start in on my

发表于:2018-12-30 / 阅读(151) / 评论(0)

托福听力短文

托福听力短文 II-02-2

(MA) That's an interesting question, Tom. Women did participate in the early days of motion-picture making. One of the most outstanding is Lois Weber. She is credited as the first consistently successful woman film director. In the early 1900's, whe

发表于:2018-12-30 / 阅读(109) / 评论(0)

托福听力短文

多功能英语阅读38 The Towers(II)

发表于:2019-01-02 / 阅读(136) / 评论(0)

多功能英语阅读

生活希望我们学会的50条人生道理II

11. People who are meant to be together will find their way back to each other. They may take detours, but theyre never lost. 11. 命中注定要在一起的人终究会找到通向对方的路。虽然途中可能会走不少弯路，但是他们绝对

发表于:2019-01-08 / 阅读(135) / 评论(0)

励志英语

你可否记得：那些被遗忘的人生哲理II

11.Having a plan, even a flawed one at first, is better than no plan at all. 先制定计划，即使这个计划还有缺陷也比没有任何计划要好。 12.What you do every day matters more than what you do every once in a while. 每天持之以

发表于:2019-01-08 / 阅读(189) / 评论(0)

励志英语

钻石透镜 II by 菲茨·詹姆斯·奥布赖恩

'The Diamond Lens' by Fitz-James O'Brien, Part Two 钻石透镜 II by 菲茨詹姆斯奥布赖恩 Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and final part of the story. Here is Maurice J

发表于:2019-01-12 / 阅读(282) / 评论(0)

2016年VOA慢速英语(九)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(146) / 评论(0)

VOA标准英语2010年(十)月

More to Learn—说谎&遗憾 II

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:2019-01-15 / 阅读(130) / 评论(0)

英语摩天轮—More to Learn

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

音乐咖啡厅:Con II Tuo Nome浸入灵魂的伤感

浸入灵魂的伤感Ivana Spagna ---《Con II Tuo Nome》意大利女歌手Ivana Spagna演唱的这首曲子令人感到一股莫明的悲伤，她那高亢浓郁的嗓音似乎不在在意你是否已处悲伤，仍然用一个个伤感的旋律和自符狠狠的把你推入哀伤与悲凉的旋涡，似乎这种莫明的伤感已经透入了

发表于:2019-02-08 / 阅读(195) / 评论(0)

音乐咖啡厅

英语歌曲:布鲁斯 Boyz II Men - If you leave me now

节奏布鲁斯:Boyz II Men - If you leave me now 相关介绍：Boyz II Men成立于1988年，其四个成员Shawn Stockman(1972.9.26--)、Wanya Morris(1973.7.29--)、Nathan Morris(1971.6.18--)以及Micheal McMary(1972.12.16--)都是费城音乐学校

发表于:2019-03-02 / 阅读(260) / 评论(0)

节奏布鲁斯

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学英语单词

a-ba

accounting event

allurings

alternating current arc source