标签：treatable 相关文章
Tuberculosis infects nearly ten million people each year and kills nearly two million. It is primarily a lung disease that spreads easily among people with weakened immune systems. Sub-Saharan Africa is still the epicenter of the HIV/AIDS disaster, b
发表于:2019-02-04 / 阅读(76) / 评论(0)
VOA标准英语2010年(七)月
VOA标准英语2010年(七)月