单词：cobalt(iii) fluoride
单词：cobalt(iii) fluoride 相关文章
ACT III Here's the bag. 箱子拿来了。 Will he be OK, Dad? 他会没事吗,爸爸? I hope so. 希望没事。 That's it. 对啦。 That's the way. 就这样。 That's it. There. 很好,啊。 Oh,
2008年NPR美国国家公共电台二月
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
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
By David Lewis A natural resources watchdog group issued a report Tuesday warning that smuggling and corruption are costing the Democratic Republic of Congo millions of dollars a month in lost revenue
VOA2004（下）--世界经济
AS IT IS 2016-07-29 Congo's Small Miners Fill Hole Left by Big Businesses 刚果小矿工填补大企业留下的洞穴 As large mining companies in the Democratic Republic of Congo are eliminating jobs, government officials are expanding the role of
2016年VOA慢速英语(八)月
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
Australian Scientists Propose a Telescope to Look Deep Underground Scientists in Australia want to build what they describe as a downward looking telescope to look for mineral wealth under the Earths surface. The telescope is really a project aimed a
2018年VOA慢速英语(十)月
BMW Joins Project to Improve Mining Conditions in Congo German carmaker BMW is exploring ways to improve working conditions at cobalt mines in Congo. 德国车企宝马正在寻找方法以提升刚果钴矿的工作环境。 Cobalt is a hard, shiny
2018年VOA慢速英语(十二)月
21. Never regret. If its good, its wonderful. If its bad, its experience. 21. 不要后悔。如果成功，那是最好；如若失败，也是一段经历。 22. Being busy and being productive are two different things. 22. 忙和高产是两码事。
励志英语
21.Being busy and being productive are two different things. 忙忙碌碌和工作高效是完全不同的两码事。 22.Being happy and being successful are two different things. 幸福和成功是完全不同的两码事。 23.We all have differen
励志英语
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
This show is centered on an in-depth report that concerns child labor, a large African country and the element of cobalt. We're explaining how all those things are tied together. First, the issue of child labor. The United Nations defines this as wor
CNN美国有线新闻2018年7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
[00:00.00]Listening Comprehension (20 minutes) [00:-1.00]Section A [00:-2.00]Directions:In this section,you will hear 10 short conversations.At the end of each conversation,a question will be asked about what was said.Both the conversation and the qu
英语六级听力练习集锦
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
C McGill Comedy Club Important meeting today. Discussions on putting on Blazing Saddles.Union room 302, 3-4 pm. New members(both actors and non-actors, living and dead )are welcome. History Students'
实用英语
As China Molybdenum announced it was buying one of Africas largest copper mines earlier this month one thing was soon clear: the acquisition was about far more than the red metal. 随着洛阳钼业(China Molybdenum)本月早些时候宣布正在收购
英语新闻
E HOW TO BOOK Booking opens for Beckett Shorts on 8 September. BY TELEPHPNE For credit card ( 信用卡 ) bookings. Calls are answered. BOX OFFICE 01789 295623 9am 8pm(Mon-Sat) 0541 541051 (24hours, 7
实用英语
C I’m seventeen. I had worked as a box boy at a supermarket in Los Angeles. People came to the counter and you put things in their bags for them. And carried things to their cars. It was hard work.
实用英语