[化] 三氟化钒

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(170) / 评论(0)

Scientific American(十二)月

听电影学英语-生活大爆炸第一季 14．The Nerdvana Annihilation(完全Geek湮灭): 时光机事件

[00:03.44]this sandwich is an unmitigated disaster. 这个三明治真是十足的失败 [00:06.24]I asked for turkey and roast beef 我要的是全麦面包里面夹火鸡 [00:06.56]with lettuce and swiss on whole wheat. 和烤牛肉还有莴苣和瑞

发表于:2018-12-07 / 阅读(160) / 评论(0)

听电影学英语-生活大爆炸

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(132) / 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(160) / 评论(0)

口腔临床英语对话

必背英文面试口语75:为何你的工作经历中有一段很长的空白期?

Why is there is a long gap in your employment history? 为何你的工作经历中有一段很长的空白期？ Between my first and second jobs,I decided to take a year off to travel around the world. 在第一份和第二份工作之间，我决定休

发表于:2018-12-31 / 阅读(161) / 评论(0)

必背英文面试口语

生活大爆炸第一季第十四集_3：The Nerdvana Annihilation

-Sheldon: What are you doing? 你在干什么? -Leonard: I'm packing up all my collectibles and taking them down o the comic book store to sell. pack up: 打包 collectible：收藏品我在打包我的收藏品...带到楼下的漫画书店去卖掉

发表于:2019-01-01 / 阅读(133) / 评论(0)

生活大爆炸第一季

生活大爆炸第一季第十四集_2：The Nerdvana Annihilation

-Penny: Okay, first of all, what you call a gap was nearly three feet wide. I slipped And skinned my knee. Are You okay? first of all：首先 gap：缝隙 slip：滑 skin：剥皮好吧首先呢你所谓的小缝隙有足足3英尺(0.9米)宽我跳过

发表于:2019-01-01 / 阅读(107) / 评论(0)

生活大爆炸第一季

生活大爆炸第一季第十四集_1：The Nerdvana Annihilation

-Sheldon: This sandwich is an unmitigated disaster. I asked for turkey and roast beef with lettuce and Swiss on whole wheat. unmitigated: 绝对的，十足的 disaster: 灾难 turkey：火鸡 roast：烤肉，烘烤 lettuce：莴苣 swiss：瑞士奶

发表于:2019-01-01 / 阅读(164) / 评论(0)

生活大爆炸第一季

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

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(137) / 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(130) / 评论(0)

英语单词荟萃

汽车自动贩卖机投币取车成现实

Thanks to used-car website Carvana, it is now possible to buy your own set of wheels at the touch of a button, from the worlds first and only coin-operated car vending machine in Nashville, Tennessee. Its quick, its easy, and its err not cheap, but c

发表于:2019-02-17 / 阅读(117) / 评论(0)

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