标签：unstable 相关文章
By Gilbert da Costa Abuja 13 May 2006 Senior military officers from the United States and officials of the Economic Community of West African States (ECOWAS) have been meeting in Abuja, Nigeria to dra
发表于:2019-01-06 / 阅读(111) / 评论(0)
2006年VOA标准英语（五月）
2006年VOA标准英语（五月）
Active MRI Shows How Joints Work 活动核磁共振成像显示身体关节如何运作 Since its introduction in the 1980s, magnetic resonance imaging machines, commonly known as MRI scanners, have become a highly valuable tool in diagnostic medicin
发表于:2019-01-14 / 阅读(89) / 评论(0)
VOA标准英语2014年(三月)
VOA标准英语2014年(三月)