"There are at least 27 different indigenous groups in Colombia that are considered to be at risk of extinction largely as a result of armed conflict and forced displacement.
VOA: standard.2009.03.22
Dr.Leslie Miller at Washington Hospital Center is involved in clinical trials of heart pumps, including this one that the U.S.Food and Drug Administration has approved as a device that can permanently replace the heart for patients who are too old to be considered for a heart transplant.
VOA: standard.2010.01.27
应用推荐