Throughout the world 36 million people are suffering from AIDS , which is more than the whole population of Australia. At present , AIDS is the fourth leading cause of death in the whole world , and the chief culprit in Africa. In Africa , it deprives jobs of the workers , families of incomings and children of their parents. In seven African countries , more than 20 percent of the 15-to-49-year-old population is infected with HIV. 难点注释: 1 )染上艾滋病suffer from AIDS 2 )头号罪魁the chief culprit 3 )使......丧失deprive of 4 )艾滋病病毒感染者people infected with HIV