苏丹人民解放运动的发言人告诉美国之音的“非洲拂晓”节目,南苏丹反政府武装领导人、过渡联合政府的前第一副总统马查尔星期四将打破沉默。South Sudan rebel leader and former first vice president in the Transitional Government of National Unity, Riek Machar, will break his silence Thursday, a spokesman for the SPLM-IO movement told VOA Daybreak Africa.