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找不到好的英语六级听力练习材料?绝对是你的不二选择。大家平时多用英语磨耳朵，时间长了英语六级听力绝对会有很大的提高。 英语六级听力练习：标准4.5 点击收听 CHICAGOGuinea worm disease and river blindness are among 17 tropical diseases the World Health Organization considers neglected. Thanks to the efforts of the Atlanta-based Carter Center -- founded by former president Jimmy Carter and his wife Rosalynn -- focused treatment and prevention are leading to the elimination of one, and the extinction of another. When former president Jimmy Carter and the Carter Center staff started working to eradicate Guinea Worm disease in 1986, it was found in 21 countries in Africa and Asia. We had three-and-a-half million cases of guinea worm, and village by village we have done away with it. Last year, we only had 146 cases in the whole world, he said. Most of the remaining infections by the parasitic worm are found in South Sudan, where Carter said, despite the recent unrest, the Carter Center continues working to prevent transmission of the disease by monitoring and filtering water sources. At this moment we have about 212 people on our payroll, almost all of whom have been trained locally, and about 8,000 women who volunteer their services, he said. Eliminating river blindness | 
