广播电视英语短句 第 144 课：食用木薯-3

But it threatens more than thirty million tons a year of production in East Africa. 但却威胁到了东亚每年超过3百万吨的产量。

In some areas of Uganda, rates of brown streak reached more than eighty-five percent in two thousand five and two thousand eight. 在2005年到2008年期间，乌干达一些区域的褐条病比率高达85%。

Claude Fauquet is a scientist at the Donald Danforth Plant Science Center in Saint Louis, Missouri. Claude Fauquet 是密苏里州圣路易斯唐纳德植物科学中心的科学家。

He says a few varieties of cassava can resist brown streak, but these are not the kinds Africans like. 他表示只有少数类品种的木薯能抵抗褐条病，但这些并不是非洲人喜欢的品种。

He is working to develop disease-resistant plants, but he says it will probably take five years. 他工作致力于开发抗疾病性的植物，但他表示这可能需要花上5年才能实现。