I have come to the conclusion that it is because it requires simultaneous harmony at four levels: the international community; the regional partners; the Government of National Unity of Sudan; and, finally, the movements in Darfur.
我已得出结论：因为同时需要四方面协调：国际社会、区域伙伴、苏丹民族团结政府，以及最后，达尔富尔境内各运动。