单词:polyvinyliden fluoride
单词:polyvinyliden fluoride 相关文章
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
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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
Indonesian President Joko Widodo is facing a social media campaign as he prepares to seek re-election next year. The campaign has criticized him for failing to show enough sympathy to Islamic interests and the rising prices of household goods. The mo
Whats in a name? When commentator Taunya English got married, she found it wasnt so easy to adjust to a new one or the new identity that went along with it. Lately, when someone asks my name, I hesitate just for a second. My brain rifles through its
BBC interviewer: It's probably true to say that women have been affected more than men by recent changes in the way we actually live. Over a hundred years ago people began to question whether men were
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
BBC interviewer: It's probably true to say that women have been affected more than men by recent changes in the way we actually live. Over a hundred years ago people began to question whether men were really so much wiser, stronger, altogether more s
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
7.It is a wise father that knows his own child , but today a man can boost his paternal (fatherly) wisdom---or at least confirm that hes the kids dad. 【分析】并列复合句。由but连接的两个并列分句。第一个分句是强调句,强调
8. More than 60,000 people have purchased the PTKs since they first became available without prescriptions last year, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits. 【分析】复合句。句子主
Bundespraesidentenstichwahlwiederholungsverschiebung. It has a ring to it, doesnt it? Try it out for yourself: Bundespraesidentenstichwahlwiederholungsverschiebung. To an English speaker, it may seem like a meaningless, even endless assortment of let
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
Hi, everybody. This Father's Day weekend, I'd like to spend a couple minutes talking about what's sometimes my hardest, but always my most rewarding job being a dad. I grew up without my father around. He left when I was two years old, and even thoug
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
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
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
U.S. Vice President Joe Biden is urging Iraqi leaders to settle their political differences with the country's Sunni Muslim vice president facing charges that he plotted to kill other government officials. The White House says Biden telephoned Iraqi
obsession n.迷住, 困扰 obstruct v.阻隔, 阻塞, 遮断(道路、通道等) n.阻碍物, 障碍物 opt vi.选择 optimum n.最适宜 adj.最适宜的 option n.选项, 选择权, /经/买卖的特权