单词：kessel
n. (Kessel)人名；(德、荷、法、捷)克塞尔；(英、芬)凯塞尔
单词：kessel 相关文章
By Jessica Berman Washington 01 April 2008 For the past 50 years, the development of new drugs to treat tropical diseases that affect nearly one billion people has languished because it has not been profitable for drug manufacturers in the West. But
发表于:2019-02-05 / 阅读(125) / 评论(0)
VOA常速英语2008年（四月）
VOA常速英语2008年（四月）