单词：selenium(vi) fluoride
单词：selenium(vi) fluoride 相关文章
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
疯狂英语2002年
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
Scientific American(十二)月
[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
求职英语
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
科技之光
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
Entertainment
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
口腔临床英语对话
99 吸收金属原料的植物有助于抗癌药品的研制 AGRICULTURE REPORT September 25, 2001: Plants that Absorb MetalsBy George Grow （Start at 1'00
科技之光
Study Shows Vitamin E Increases Prostate Cancer Risk A number of medical studies over the years suggested that vitamin E, taken as a dietary supplement, might help prevent prostate cancer. But new research finds not only that the earlier studies were
VOA标准英语2011年(十月)
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
VOA标准英语2010年(十)月
Scientists Suggest Adding Selenium to Diets in Malawi The study, which was published in the journal Scientific Reports, found that most Malawi soils do not have an adequate amount of selenium required for human nutrition. In the report, researchers a
VOA标准英语2013年(三月)
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
2018年科学美国人1月
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
科技之光
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
英语单词荟萃
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
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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
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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。
TED公开课:艺术与幻觉
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:
实用英语
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
大学四六级阅读
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
英文摇滚歌曲