What does Africa have to tell us that we do not already know about AIDS, the cruellest of pandemics that the world has had to confront over the past 25 years?
非洲还需要告诉我们哪些我们还不知道的关于艾滋病的情况？ 25年来，全世界不得不面对这一最残酷的大流行病。