单词：collodion silk
单词：collodion silk 相关文章
The East African Community, a grouping of 5 countries in and around the Horn, is continuing to work towards its goal of regional economic integration. Members of the EAC are dropping barriers to trade, with the goal of eventually adopting a common cu
VOA标准英语2010年(十二)月
Science Challenges Await at Top US High School 美国顶级高中的科学挑战赛 POOLESVILLE, MARYLAND Whether creating small rovers to explore a simulated moon-like celestial body or participating in science competitions, students at Poolesville
VOA标准英语2014年(六月)
Representatives from the world's top energy consuming and greenhouse gas emitting nations are through Tuesday in Paris for global warming talks before a major U.N. conference in December. Most energy use produces carbon dioxide and other greenhouse
VOA标准英语2009年(五月)
New Procedure Could Get More TB Patients Treated An international team of researchers has found that revised protocols for diagnosing tuberculosis may be more user-friendly for patients and help bring more people into treatment, especially in poorer
VOA标准英语2011年(七月)
7) 科技 科学发展观 concept of scientific development 全民科学文化素质 scientific and cultural qualities of the entire people 发展科技 scientific and technological advancement 科教兴国 revitalize China through science and educat
英语口译
As five European foreign ministers meet in Copenhagen to prepare for an aggreement to succeed the Kyoto Protocol, scientists in Greenland are warning about accelerated glacier melts. Several years ago, scientists reported that the Helheim Glacier, su
自然百科2009年