单词：laser extraction chemistry
单词：laser extraction chemistry 相关文章
By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca
VOA常速英语2008年（四月）
express vt.表示 n.快车，快递 expression n.词句；表达；表情 extend vt.延长；扩大；致 extension n.延长部分；伸展 extensive a.广阔的；广泛的 extensively ad. 广泛地；
考研英语
Shedding Light on Extraction Industries Europe is a step closer toward curbing corruption in extraction industries in developing countries. A European Parliamentary committee has approved proposed legislation that would require European companies to
VOA标准英语2012年(九月)
5.常见手术名称 General Surgery 普外 appendectomy （appendicectomy） 阑尾切除术 cholecystectmy 胆囊切除术 cholecystostomy 胆囊造口术 drainage of the abscess 脓肿引流 enterostomy 肠造口术 exploratory laparotomy 开腹探查
英文语法词汇
By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti
VOA常速英语2007年（十一月）