America played a big role in ending the war between north and south Sudan, but its efforts to douse the flames in Darfur have yet to succeed.

• 在结束南部苏丹和北部苏丹的战争中，美国也扮演了重要角色，但它试图熄灭达尔富尔动乱火焰的努力没有能够成功。