单词：molar cohesive energy
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A lot of people have had impacted third molars. Third molars produce a lot of chronic pain. Alan Mann, a Prinston University physical anthropologist at the annual meeting of the American Association for the Advancement of Science in Boston on Februar
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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
BBC Learning English Weekender Core British Values Yvonne: This is Weekender and helloIm Yvonne Archer! Now what comes to mind if I mention the term British Values? Well, thats a question several people have been pondering since the recent news head
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DAVID GREENE, HOST: The Trump administration's rollback of coal plant regulations last week has renewed hopes for those in the industry that some plants might stay open a little longer. The share of coal in the country's energy mix has dropped dramat
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American architectural photographer presents a new collection of images that give a glimpse into Incan genius for integrating architecture and nature Faiza Elmasry | Washington, DC 14 December 2009 Watch: Elmasry report voiced by Deborah Block Window
VOA标准英语2009年(十二月)