单词：molar optical rotatory power
单词：molar optical rotatory power 相关文章
By Paul Sisco Washington D.C. 24 January 2008 Wing Power, wave power, people power. Italian inventor Lucien Gambarota tries to capitalize on all three. VOA's Paul Sisco explains in this week's Searching for Solutions report. Lucien Gambarota is a vis
VOA标准英语2008年（一月）
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
Scientific American(二)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
American History: Early Leaders Debate the Issue of Presidential Powers From VOA Learning English, welcome to THE MAKING OF A NATION American history in Special English. Im Steve Ember. This week in our series, we continue the story of the United Sta
2013年VOA慢速英语(五)月
The Vikings who would eventually descend on Ireland had their ancestral roots here in Norway. From these fjords, they created a maritime empire that stretched from the shores of America in the west to central Russia in the east. The Viking world of t
探索与发现2012年
By the 11th century, the Vikings who had settled in Ireland, the Hiberno-Norse, had been here for over a century and a half. Theyd intermarried, become Christian and formed local alliances. Theyd founded thriving port cities like Waterford, Wexford,
探索与发现2012年
China's Tibet Autonomous Region is about to achieve a universal coverage of fibre-optical broadband service ahead of its schedule. As China further rolled out its universal broadband project, Tibet's broadband service is looking to reach 98% of admin
2018CRI中国国际广播电台